RJ Pre PG 2018 — Agri Master Mind

Which option represents informal rules of behavior?
  • Laws
  • Norms
  • Mores
  • Folkways
Explanation: Folkways are informal customs guiding everyday behavior.
What is the most important focal point in the teaching and learning process?
  • Teacher
  • Subject Matter
  • Learner
  • Physical facilities
✅ Explanation: The learner is the central focus of the teaching and learning process. The entire process is designed to facilitate the learner's understanding and acquisition of knowledge and skills.
Which stage of the adoption process is the "Mental Trial"?
  • Awareness
  • Evaluation
  • Interest
  • Trial
Explanation: In Evaluation, potential adopters mentally assess an innovation.Other Options Explanations:Awareness: Becoming aware of an innovation.Interest: Seeking more information.Trial: Testing an innovation on a small scale.
What percentage of the population are early adopters?
  • 2.50%
  • 34%
  • 16%
  • 13.50%
Explanation: In the diffusion of innovations theory, early adopters represent the second group of people to adopt an innovation. They are typically respected individuals within their social system and are seen as opinion leaders. They make up about 13.5% of the population.Adopter Categories:Innovators: 2.5%Early Adopters: 13.5%Early Majority: 34%Late Majority: 34%Laggards: 16%
From which language does the word "Communication" originate?
  • Latin
  • French
  • Portuguese
  • Spanish
Explanation: The word "communication" comes from the Latin "communicare".
What is known as "Picture Drama"?
  • Poster
  • Flash Cards
  • Flannel Graph
  • Black Board
✅ Explanation: A flannel graph uses figures or cutouts on a flannel board to visually represent a story or concept, creating a dynamic and engaging "picture drama."Other Options Explanations:Poster: Visual aid for information.Flash Cards: Interactive learning tool.Black Board: Traditional teaching tool.
Which option is not a group teaching method?
  • Result Demonstration
  • Campaign
  • Method Demonstration
  • Field day
✅ Explanation: A campaign is a planned series of activities designed to achieve a specific goal, often involving public awareness and advocacy. While it may involve some elements of teaching, it is not primarily a group teaching method.Other Options Explanations:Result Demonstration: Showcasing positive outcomes.Method Demonstration: Demonstrating techniques.Field day: Interactive learning event.
Through which program did Technologies Assessment and Refinement (TAR) take place?
  • ATMA (Agricultural Technology Management Agency)
  • T&V (Training and Visit System)
  • PMRY (Pradhan Mantri Rojgar Yojana)
  • IVLP (International Visitor Leadership Program)
Explanation: The Training and Visit (T&V) system assessed and refined technologies through farmer feedback.Other Options Explanations:ATMA (2005): Strengthens agricultural productivity through decentralized management.PMRY (1993): Promotes self-employment and entrepreneurship.IVLP (1940): Facilitates international exchange among emerging leaders.
From which language is the word "Entrepreneur" borrowed?
  • French
  • Amharic
  • Latin
  • Arabic
Explanation: The word "Entrepreneur" originates from French.
How many farmers were selected as "contact farmers" in the T&V system?
  • 5
  • 10
  • 15
  • 20
Explanation: In the T&V system, 10 farmers were selected as contact farmers.Role of Contact Farmers:Receive intensive training from extension workers.Disseminate information to other farmers in their village.
What type of sugar is lactose?
  • Monosaccharide
  • Disaccharide
  • Oligosaccharide
  • Polysaccharide
Explanation: Lactose is a disaccharide composed of glucose and galactose.Other Options Explanations:Monosaccharide: Simplest form of sugar (e.g., glucose, fructose).Oligosaccharide: Composed of 3-10 monosaccharides.Polysaccharide: Composed of many monosaccharides (more than 10).
Which biomolecule is characterized by peptide bonds?
  • Carbohydrates
  • Nucleic acids
  • Lipids
  • Proteins
Explanation: Peptide bonds join amino acids together in protein chains.Other Options Explanations:Carbohydrates: Joined by glycosidic bonds.Nucleic acids: Consist of nucleotides joined by phosphodiester bonds.Lipids: Linked by ester bonds.
How many hydrogen bonds form between guanine and cytosine?
  • 2
  • 6
  • 3
  • 1
Explanation: Guanine and cytosine form three hydrogen bonds.
Where does photosynthesis take place?
  • Chloroplast
  • Golgi Body
  • Nucleus
  • Mitochondria
Explanation: Chloroplasts contain chlorophyll for photosynthesis.Other Options Explanations:Golgi Body: Involved in protein packaging and modification.Nucleus: Contains genetic material (DNA).Mitochondria: Responsible for cellular respiration.
From which compound are phenols derived?
  • Glucose
  • Glycine
  • Phenylalanine
  • Phosphate
Explanation: Phenylalanine serves as a precursor for phenol biosynthesis.Other Options Explanations:Glucose: A simple sugar.Glycine: The simplest amino acid.Phosphate: Component of nucleic acids and ATP.
Which phytohormone is associated with shoot elongation?
  • Auxin
  • Abscisic acid
  • Cytokinin
  • Ethylene
Explanation: Auxin promotes cell elongation in shoots.Other Options Explanations:Abscisic acid: Involved in stress responses and growth inhibition.Cytokinin: Promotes cell division and shoot growth.Ethylene: Involved in fruit ripening and senescence.
What term describes the ability of certain plant cells to regenerate a whole plant?
  • Autotomy
  • Totipotency
  • Withering
  • Differentiation
Explanation: Totipotency allows a single cell to divide and differentiate into all specialized cell types.
When do short-day plants undergo flowering?
  • Night length falls below their critical Photoperiod
  • Night length exceeds their critical Photoperiod
  • Are unresponsive to day/night length
  • Night length is equal to day length
Explanation: Short-day plants flower when night length exceeds their critical photoperiod.Other Options Explanations:Long-day plants: Flower when night length falls below their critical photoperiod.Day-neutral plants: Unresponsive to day/night length.
Which micronutrient mainly affects flowering and fruiting in plants?
  • Iron
  • Manganese
  • Magnesium
  • Boron
Explanation: Boron plays a critical role in pollen tube growth, fertilization, and fruit set.Other Options Explanations:Iron: Important for chlorophyll synthesis and electron transport.Manganese: Involved in photosynthesis and enzyme activation.Magnesium: Central component of chlorophyll and enzymatic reactions.
What is the product of beta-oxidation of fatty acids?
  • Glucose
  • Citric acid
  • Acetyl
  • Pyruvic acid
Explanation: Beta-oxidation is the process by which fatty acids are broken down in the mitochondria to produce acetyl-CoA, which then enters the citric acid cycle (Krebs cycle) for further energy production.Other Options Explanations:Glucose: Simple sugar, product of photosynthesis.Citric acid: Intermediate in the citric acid cycle.Pyruvic acid: End product of glycolysis.
At what temperature does air become saturated with water vapor?
  • Dew point
  • Frost Point
  • Cold Point
  • Frigid Point
Explanation: The dew point is the temperature at which air becomes saturated, leading to condensation.Other Options Explanations:Frost Point: Temperature at which air becomes saturated enough to form frost (below freezing).
What term describes an area where surplus runoff drains through a common point?
  • Run-off unit
  • Conservation unit
  • Water pond
  • Watershed
Explanation: A watershed is an area where all water drains to a common point.Other Options Explanations:Run-off unit: Area contributing to runoff during a specific rainfall event.Conservation unit: Land area managed for specific conservation purposes.Water pond: Small body of still water.
Which option is not a recognized variety of Isabgol (Plantago ovata)?
  • JI-4
  • SI-20
  • HI-5
  • GI-2
Explanation: JI-4, SI-20, and GI-2 are recognized varieties, but HI-5 is not.
At what hand refractometer reading is sugarcane considered mature?
  • 10-Dec
  • 14-15
  • 19-22
  • 32-34
Explanation: A reading of 19-22 °Bx indicates sugarcane has reached maturity.°Bx Explanation: Degrees Brix measure sucrose content in sugarcane juice.
Which micronutrient is primarily absorbed as an anion?
  • B (Boron)
  • Fe (Iron)
  • Mn (Manganese)
  • Zn (Zinc)
Explanation: Boron is absorbed as the borate anion (BO33- or B4O72-).Other Options Explanations:Fe (Iron): Primarily absorbed as cations (Fe2+ or Fe3+).Mn (Manganese): Primarily absorbed as cations (Mn2+).Zn (Zinc): Primarily absorbed as cations (Zn2+).
What type of wheat is known as "Macaroni Wheat"?
  • Triticum aestivum
  • Triticum durum
  • Triticum dicoccum
  • Triticum Sphaerococcum
Explanation: Triticum durum (Durum wheat) is high in protein and gluten.Other Options Explanations:Triticum aestivum: Common wheat for bread and baked goods.Triticum dicoccum: Emmer wheat, an ancient grain.Triticum Sphaerococcum: Indian dwarf wheat.
What type of germination does soybean exhibit?
  • Hypogeal
  • Semigial
  • Epigeal
  • Decigial
Explanation: Epigeal germination occurs when cotyledons are pushed above the soil surface.✅ Explanation: Epigeal germination refers to a type of seed germination in which the cotyledons (seed leaves) are pushed above the soil surface. Here are examples of field crops that exhibit epigeal germination:Common Bean (Phaseolus vulgaris) Soybean (Glycine max) Cotton (Gossypium hirsutum) Sunflower (Helianthus annuus) Castor Bean (Ricinus communis)Hypogeal: In hypogeal germination, the cotyledons remain below the soil surface while the epicotyl (the part of the seedling above the cotyledons) grows upwards. Here are examples of field crops that exhibit hypogeal germination:Pea ( Pisum sativum)● Maize (Zea mays)● Rice (Oryza sativa)● Wheat (Triticum aestivum)● Groundnut (Arachis hypogaea)
What is the recommended moisture content for safe storage of groundnut pods?
  • Not more than 5%
  • Not more than 12%
  • Not more than 15%
  • Not more than 15%
✅ Explanation: Groundnut pods are susceptible to fungal growth and spoilage if stored with high moisture content. Maintaining a moisture content of not more than 5% ensures that the pods remain dry and safe for extended storage, preventing mold and aflatoxin contamination.Cereals (wheat, rice, maize, barley) : 12–14%Oilseeds (soybean, groundnut, sunflower, rapeseed): 7–9% Pulses (lentils, chickpeas, beans, peas): 10–12%
What herbicide is recommended for pre-emergence weed control in pearl millet?
  • 2,4-D at 0.5kg ai/ha
  • Metsulfuron at 0.5 kg ai/ha
  • Clodinafop at 0.5 kg ai/ha
  • Atrazine at 0.5kg ai/ha
Explanation: Atrazine effectively controls a broad spectrum of weeds.Other Options Explanations:2,4-D: Selective herbicide for broadleaf weeds.Metsulfuron: Post-emergence herbicide for broadleaf weeds.Clodinafop: Post-emergence herbicide for grasses.
What is the staple length of short staple cotton?
  • Less than 19mm
  • 30 to 32mm
  • 33 to 34mm
  • More than 34mm
Explanation: Short staple cotton has a shorter staple length.Cotton Classification:Short staple: Less than 19mmMedium staple: 19-24mmLong staple: 25-32mmExtra-long staple: More than 32mm
What term describes excess water from precipitation that flows out of fields and into rivers, lakes, and oceans?
  • Percolation
  • Seepage
  • Runoff
  • Water harvesting
✅ Explanation: Runoff is the flow of water over the land surface that occurs when the soil is saturated or unable to absorb all the water from precipitation or irrigation. This excess water flows across the land and eventually enters rivers, lakes, and oceans.Other Options Explanations:Percolation: Downward movement of water through the soil profile.Seepage: Slow movement of water through porous materials or small cracks.Water harvesting: Collection and storage of rainwater or runoff.
What color represents Land Capability Class II?
  • Yellow
  • Pink
  • Brown
  • Green
Explanation: In the land capability classification system, Class II lands are typically depicted in pink. These lands have some limitations that reduce the choice of plants or require moderate conservation practices.Other Options Explanations:Yellow (Class III): Severe limitations.Brown (Class IV): Very severe limitations.Green (Class I): Few limitations.
How are soils with no diagnostic horizon and slight profile development classified?
  • Ultisol
  • Inceptisol
  • Oxisol
  • Entisol
Explanation: Inceptisols are soils with minimal horizon development. They are young soils with few distinguishing features other than an ochric epipedon (a surface horizon with a light color and low organic matter content).Other Options Explanations:Ultisol: Highly weathered soils with clay accumulation.Oxisol: Highly weathered soils rich in iron and aluminum oxides.Entisol: Recently formed soils with little profile development.
How is Single Superphosphate (SSP) manufactured?
  • Acidulation of rock phosphate with sulphuric acid
  • Acidulation of rock phosphate with nitric acid
  • Acidulation of rock phosphate with phosphoric acid
  • Acidulation of rock phosphate with oxalic acid
Explanation: SSP is produced by treating rock phosphate with sulphuric acid.Other Options Explanations:Nitric acid: Produces nitrophosphate fertilizers.Phosphoric acid: Produces triple superphosphate (TSP).Oxalic acid: Not commonly used in fertilizer production.
Which elements are not universally essential but beneficial for some plant species?
  • Zinc and Molybdenum
  • Cobalt and Vanadium
  • Iron and Boron
  • Boron and Copper
Explanation: Cobalt and Vanadium are beneficial for some plants.Other Beneficial Elements:Silicon (Si): Enhances plant strength and resistance.Sodium (Na): Helps with water balance in some plants.Cobalt (Co): Involved in nitrogen fixation.Vanadium: Influences plant growth regulation.
What causes Khaira disease in rice?
  • Rhizoctonia spp
  • Aspergillus spp
  • Deficiency of Zinc
  • Xanthomonas Spp
Explanation: Khaira disease in rice is a physiological disorder primarily caused by the deficiency of zinc in the soil. Zinc is an essential micronutrient for plant growth and development, and its deficiency can lead to various symptoms, including stunted growth, yellowing of leaves, and reduced yield.Other Options Explanations:Rhizoctonia spp: Soil-borne fungi.Xanthomonas Spp: Bacteria causing bacterial leaf blight.
How is soil aeration status best measured?
  • ODR measurement
  • Percent Microposity
  • Percent Porosity
  • WHC measurement
Explanation: Oxygen Diffusion Rate (ODR) is the most direct and accurate way to measure soil aeration status. It measures how quickly oxygen can move through the soil, which is crucial for root respiration and overall plant health.Other Options Explanations:Percent Microposity: Proportion of small pores.Percent Porosity: Total pore space.WHC measurement: Water Holding Capacity.
Calculate the specific heat of a soil with 25% moisture.
  • 0.18 Cal/g
  • 1.36 Cal/g
  • 3.6 Cal/g
  • 0.36 Cal/g
✅ Explanation: The specific heat of a soil-water mixture can be calculated using the following formula:Specific heat of soil = (Proportion of water x Sp. heat of water) + (Proportion of soil solids x Sp. heat of soil solids)In this case:● Proportion of water = 25% = 0.25● Proportion of soil solids = 100% - 25% = 75% = 0.75Specific heat of soil = (0.25 x 1.0) + (0.75 x 0.2) = 0.25 + 0.15 = 0.36 Cal/g
What nutrient does Mehlich's Cunninghamella plaque method estimate?
  • Zinc
  • Nitrogen
  • Boron
  • Phosphorus
Explanation: : Mehlich's cunninghamella plaque method is a biological assay used to estimate the available phosphorus in soil. It utilizes the growth of a specific fungus, Cunninghamella, on a nutrient medium containing the soil sample. The size of the fungal plaque (colony) is directly related to the amount of available phosphorus in the soil.
What class does Albugo candida, the white rust fungus, belong to?
  • Basidiomycetes
  • Ascomycetes
  • Oomycetes
  • Deuteromycetes
Explanation: Albugo candida, the causal agent of white rust disease in various plants, belongs to the class Oomycetes. Oomycetes are fungus-like organisms, also known as water moulds, that are distinct from true fungiOther Options Explanations:Basidiomycetes: True fungi, including mushrooms and rusts.Ascomycetes: True fungi, including yeasts and moulds.Deuteromycetes: Fungi lacking a known sexual stage.
What are viruses that kill bacteria called?
  • Vinion
  • Antibodies
  • Bacteriophages
  • Viroids
Explanation: Bacteriophages infect and replicate within bacteria.Other Options Explanations:Antibodies: Proteins fighting infections.Viroids: Infectious agents composed solely of RNA.
Who developed the first practical microscope?
  • Theophrastus
  • Shakespeare
  • Leeuwenhoek
  • Micheli
Explanation: Explanation: Albugo candida, the causal agent of white rust disease in various plants, belongs to the class Oomycetes. Oomycetes are fungus-like organisms, also known as water moulds, that are distinct from true fungiOther Options Explanations:Theophrastus: Ancient Greek philosopher and botanist.Micheli: Italian botanist who contributed to fungi study.
Which disease is internally seed-borne?
  • Black rust of wheat
  • Peach leaf curl
  • Sheath blight of rice
  • Loose smut of wheat
✅ Explanation: Loose smut of wheat is caused by the fungus Ustilago tritici, which infects the wheat plant during flowering and grows systematically within the plant. The fungal spores replace the kernels with black masses of spores, hence the name "loose smut." These spores can contaminate healthy seeds during harvest and threshing, leading to the disease being carried within the seeds (internally seed-borne) and spreading to the next generation of crops.Other Options Explanations:Black rust of wheat: Airborne spores.Peach leaf curl: Affects leaves and shoots.Sheath blight of rice: Soil-borne disease.
What type of pesticide is Karathane?
  • Fungicide
  • Insecticide
  • Nematicide
  • Bactericide
Explanation: Karathane contains dinocap, controlling powdery mildew.
What causes Late Blight of Potato?
  • Plasmopara
  • Phytophthora infestans
  • Pythium aphanidermatum
  • Rhizopus oryzae
Explanation: Late blight of potato is a devastating disease caused by the oomycete pathogen Phytophthora infestans. It was responsible for the Irish Potato Famine in the 19th century.Other Options Explanations:Plasmopara: Causes downy mildew.Pythium aphanidermatum: Causes damping-off disease.Rhizopus oryzae: Fungus causing various diseases.
Who developed Bordeaux mixture?
  • Anton de Bary
  • P.M.A. Millardet
  • E.J. Butler
  • J.C. Walker
Explanation: Pierre-Marie-Alexis Millardet developed Bordeaux mixture.Other Options Explanations:Anton de Bary: Father of plant pathology.E.J. Butler: British mycologist.J.C. Walker: American plant pathologist.
Who is considered the Father of Nematology?
  • Kuhn
  • N.A. Cobb
  • Siddiqui
  • Needham
Explanation: Nathan Augustus Cobb is considered the "father of Nematology." He made significant contributions to the study of nematodes, including developing techniques for their preparation and study, and describing numerous new species.Other Options Explanations:Kuhn: Agricultural chemist.Siddiqui: Indian nematologist.
Where was the Golden Cyst Nematode first reported in India?
  • Shimla hills
  • North Eastern hills
  • Indo-gangetic plains
  • Nilgiri hills
Explanation: Globodera rostochiensis was first reported in Shimla hills.Impact: Serious pest of potato crops, causing significant yield losses.
Which nematode body part plays a vital role in host-finding?
  • Phasmids
  • Amphids
  • Cloaca
  • Vulva
Explanation: Amphids are sensory organs located near the head region of nematodes. They are chemoreceptors that detect chemicals in the environment, helping nematodes locate suitable hosts and food sources.Other Options Explanations:Phasmids: Sensory organs in the tail region.Cloaca: Common opening for digestive, reproductive, and excretory systems.
What order do mayflies belong to?
  • Ephemeroptera
  • Dictyoptera
  • Zoraptera
  • Plecoptera
Explanation: Mayflies belong to the insect order Ephemeroptera. They are known for their short adult lifespan and their aquatic nymphs, which are important components of freshwater ecosystems.Other Options Explanations:Dictyoptera: Cockroaches and mantids.Zoraptera: Angel insects.Plecoptera: Stoneflies.
Who first used the term microbial control?
  • Steinhaus
  • Smith
  • Slama
  • Patton
✅ Explanation: Edward A. Steinhaus, an American entomologist, is credited with first using the term "microbial control" in his 1949 book "Principles of Insect Pathology." He is considered a pioneer in the field of insect pathology and biological control.Other Options Explanations:Slama: Karel Slama, Czech entomologist.
Who identified the two phases of locusts?
  • Uvarov
  • S. Pradhan
  • Rama Chaanda Rao
  • T.B. Fletcher
✅ Explanation: Sir Boris Uvarov, a Russian-British entomologist, is renowned for his work on locusts and his theory of locust phases. He identified two main phases in the locust life cycle: the solitary phase and the gregarious phase, which differ significantly in behavior, morphology, and physiology.
What causes the tubular gall or "silver shoot" in rice?
  • Orseolia oryzae
  • Sitophilus oryzae
  • Corcyra cephalonica
  • Trogoderma granarium
Explanation: Explanation: Orseolia oryzae, also known as the rice gall midge, is a dipteran insect pest that causes the formation of tubular galls on rice plants. These galls are often referred to as "silver shoots" due to their silvery appearance.Other Options Explanations:Sitophilus oryzae: Rice weevil.Corcyra cephalonica: Rice moth.Trogoderma granarium: Khapra beetle.
What transmits Sesamum phyllody, a mycoplasma disease?
  • Orosius albicinctus
  • Cestius phycitis
  • Nephotettix virescens
  • Thrips tabaci
✅ Explanation: Sesamum phyllody is a mycoplasma disease transmitted by the leafhopper Orosius albicinctus. This disease causes abnormal growth and development in sesame plants, leading to reduced yield and quality.Other Options Explanations:Cestius phycitis: Brown leafhopper.Nephotettix virescens: Green leafhopper.Thrips tabaci: Onion thrips.
What term describes severe insect infestation in a specific area?
  • Endemic
  • Epidemic
  • Sporadic
  • Occasional
Explanation: An epidemic refers to a sudden and widespread outbreak of a disease or insect infestation within a specific population or area. This sudden increase in the population of an insect pest, causing severe damage to crops in a particular region or locality, is characteristic of an epidemic.Other Options Explanations:Endemic: Regularly present at low levels.Sporadic: Occurring irregularly.
What is the primary host of Icerya purchasi, the cottony cushion scale?
  • Cotton
  • Banana
  • Citrus
  • Mango
✅ Explanation: Icerya purchasi, commonly known as the cottony cushion scale, is a pest that primarily attacks citrus trees. It feeds on the sap of the plant, causing stunted growth, defoliation, and even death of the tree.
Who discovered the malarial parasite?
  • Sir Ronald Ross
  • Stebbing
  • Fletcher
  • Patton
✅ Explanation: Sir Ronald Ross, a British physician, is credited with discovering the malarial parasite in the gastrointestinal tract of an Anopheles mosquito in 1897. This discovery was a major breakthrough in understanding the transmission of malaria.
What order do gall midges belong to?
  • Lepidoptera
  • Diptera
  • Plecoptera
  • Dermaptera
Gall midges are small flies that belong to the order Diptera, which also includes mosquitoes, houseflies, and other true flies. They are characterized by having two wings and are known for their ability to induce the formation of galls (abnormal growths) on plants.Other Options Explanations:Lepidoptera: This order includes butterflies and moths.Plecoptera: This order includes stoneflies.Dermaptera: The order which includes earwigs.
What is the host of Epiphyas melanoleuca?
  • Sugarcane leaf hopper
  • Sugarcane Whitefly
  • Sugarcane root borer
  • Sugarcane top borer
Epiphyas melanoleuca is a moth whose larvae are known to be parasitoids of the sugarcane top borer (Scirpophaga excerptalis). This means the larvae of this moth live on or inside the top borer larvae, eventually killing them. This is a form of biological control used against the sugarcane top borer pest.Other Options Explanations:Sugarcane leafhopper: Pyrilla perpusilla. These are sap-sucking insects that can damage sugarcane.Sugarcane whitefly: Aleurodicus disperses. These are tiny, sap-sucking insects that can transmit plant viruses.Sugarcane root borer: Diatraea saccharalis. These are beetle larvae that feed on the roots of sugarcane.
What is the main difference between plant and animal cells?
  • Mitochondria
  • MRNA
  • Centriole
  • Cell wall
Plant cells have a rigid cell wall made of cellulose outside their cell membrane, which provides structural support and protection. Animal cells lack a cell wall.Other Options Explanations:Mitochondria: Both plant and animal cells have mitochondria, which are responsible for energy production.MRNA (Messenger RNA): Both plant and animal cells have mRNA, which carries genetic information from DNA to ribosomes for protein synthesis.Centriole: Animal cells have centrioles, which are involved in cell division. Plant cells generally lack centrioles.
What is known as the powerhouse of the cell?
  • Golgi body
  • Mitochondria
  • Ribosomes
  • Vacuoles
✅ Explanation: Mitochondria are called the "powerhouse of the cell" because they are responsible for generating most of the cell's energy supply in the form of ATP (adenosine triphosphate) through cellular respiration.Other Options Explanations:Golgi body: Packages and modifies proteins and other cellular products.Ribosomes: The site of protein synthesis in the cell.Vacuoles: Storage organelles in cells, larger and more prominent in plant cells.
Why are most cultivated bananas seedless?
  • Nullisomy
  • Monosomy
  • Autopolyploidy
  • Allopolyploidy
✅ Explanation: Most cultivated bananas are seedless due to autopolyploidy, which means they have multiple sets of chromosomes from the same species. This often leads to sterility and the absence of seeds in the fruit.Other Options Explanations:Nullisomy: The absence of both chromosomes of a homologous pair.Monosomy: The absence of one chromosome from a homologous pair.Allopolyploidy: Having multiple sets of chromosomes from different species.
What does segregation mean?
  • Separation of two alleles
  • Separation of two genes
  • Separation of Homologous Chromosomes
  • Separation of Sister Chromatids
✅ Explanation: Segregation, as described by Mendel's Law of Segregation, refers to the separation of alleles (different versions of a gene) during gamete formation (meiosis).
Who can an individual with blood group 'AB' donate blood to?
  • A
  • B
  • AB
  • A or B
✅ Explanation: People with blood group AB are considered universal recipients because they have both A and B antigens on their red blood cells and no antibodies against either A or B antigens in their plasma. Therefore, they can only donate blood to other individuals with blood group AB.
Why is maize primarily cross-pollinated?
  • Monoecism and Protogyny
  • Monoecism and Protoandry
  • Dioecism and Protogyny
  • Monoecism
✅ Explanation: Maize is cross-pollinated due to:Monoecism: Separate male and female flowers on the same plant.Protoandry: Male flowers mature before female flowers.
In which crops is the three-line sterility system commonly used for hybrid seed production?
  • Rice
  • Sorghum
  • Bajra
  • All the above
✅ Explanation: The three-line sterility system involves:Male-sterile line (A-line): Cannot produce viable pollen.Maintainer line (B-line): Maintains male sterility.Restorer line (R-line): Restores fertility.
What term describes the effect of pollen genes on maternal tissues?
  • Xenia
  • Meta xenia
  • Maternal effect
  • Paternal effect
✅ Explanation: Xenia: Pollen genes influence phenotype of endosperm or maternal tissues.Other Options Explanations:Meta xenia: Pollen effects on pericarp or other maternal tissues.Maternal effect: Mother's genotype influences offspring's phenotype.Paternal effect: Father's genotype influences offspring's phenotype.
At which generation does selection shift from within families to among families?
  • F2
  • F3 or F4
  • F5 or F6
  • F7
✅ Explanation: In pedigree selection, individual plants are selected within families in early generations. As inbreeding progresses, selection within families becomes less effective.
What term describes a plant's adjustment to a new environment?
  • Stability
  • Selection
  • Acclimatization
  • Domestication
✅ Explanation: Acclimatization: Plants adjust physiology or morphology in response to environmental changes.Other Options Explanations:Stability: Resistance to change in a constant environment.Selection: Choosing individuals with desirable traits.Domestication: Adapting wild plants for human use.
What is the most important winter season cut flower?
  • Tuberose
  • Gladioli
  • Marigold
  • Carnation
✅ Explanation: Carnations are popular cut flowers that bloom profusely during winter, known for their beautiful colors, long vase life, and pleasant fragrance.Other Options Explanations:Tuberose: Fragrant flower blooming in summer and autumn.Gladioli: Summer-blooming flowers.Marigold: Typically blooms in spring and summer.
What is another name for Japanese-style gardens?
  • Formal garden
  • English garden
  • Mughal garden
  • Informal garden
✅ Explanation: Japanese gardens are characterized by:Asymmetrical layoutsNatural elements like rocks and waterEmphasis on tranquilityOther Options Explanations:Formal garden: Symmetry, geometric shapes, and manicured lawns.English garden: Rolling lawns, natural-looking landscapes, and picturesque views.Mughal garden: Geometric layouts, water channels, and formal planting arrangements.
Which plant growth regulator controls flower and fruit drop?
  • IAA
  • IBA
  • 2, 4-D
  • GA3
✅ Explanation: IBA (Indole-3-butyric acid) is a synthetic auxin that:Promotes root growthPrevents flower and fruit dropOther Options Explanations:IAA (Indole-3-acetic acid): Natural auxin promoting cell elongation.2, 4-D (2,4-Dichlorophenoxyacetic acid): Synthetic auxin used as a herbicide.GA3 (Gibberellic acid): Promotes stem elongation, seed germination, and fruit development.
Which winter-season vegetable is both photo-sensitive and thermo-sensitive?
  • Cabbage
  • Cauliflower
  • Pea
  • Broccoli
✅ Explanation: Cauliflower requires:Specific day lengths for curd initiationCool temperatures for development
Which district in Rajasthan has the maximum forest cover?
  • Udaipur
  • Banswara
  • Chittorgarh
  • Dungarpur
Explanation: Udaipur district in Rajasthan has the largest forest cover in the state. It is known for its diverse forests, including tropical dry deciduous forests, subtropical hill forests, and protected areas.
Who introduced canning of fruits on a commercial scale?
  • Peter Durand
  • Angilbert
  • Underwood
  • Raymond Chevalier
✅ Explanation: Peter Durand, a British merchant, is credited with receiving the first patent for preserving food using tin cans in 1810. His invention revolutionized food preservation and enabled the large-scale commercial canning of fruits and other food items.
Which Indian state has the highest area under cumin cultivation?
  • Gujarat
  • Rajasthan
  • Himachal Pradesh
  • Uttar Pradesh
✅ Explanation: Rajasthan has the largest area under cumin cultivation in India. The state's arid climate and sandy loam soils are well-suited for cumin production.
What is the minimum fruit juice content required in squash?
  • 20%
  • 25%
  • 30%
  • 22%
Explanation: According to food standards, squash, a type of fruit beverage, should contain at least 25% fruit juice to be labelled as such. This ensures a certain level of fruit content and flavour in the product.
What health issue can Senna (Cassia angustifolia) leaves and pods help control?
  • Constipation
  • Diabetes
  • Cough & Cold
  • Blood Pressure
✅ Explanation: Senna (Cassia angustifolia) leaves and pods contain sennosides, natural compounds that have laxative properties. They stimulate bowel movements and are commonly used to relieve constipation.
What is the optimal media for growing vegetable seedlings in Pro-trays?
  • Only Vermiculite
  • Only Perlite
  • 1:1:1 Cocopeat, Sand, and Soil
  • 2:1:1 Cocopeat, Sand, and Soil
✅ Explanation: This mixture provides a good balance of water retention, aeration, and nutrient availability for optimal seedling growth in pro-trays. Cocopeat retains moisture, sand provides drainage, and soil offers essential nutrients. The 2:1:1 ratio ensures adequate drainage and aeration while still retaining enough moisture.
Concentrate contain crude fibre –
  • >18%
  • <18%
  • >60%
  • <60%
✅ Explanation: Concentrates are livestock feeds that are high in energy and low in fiber. A crude fiber content of less than 18% is typical for concentrates, making them easily digestible and suitable for providing energy to animals.
Hemorrhagic septicaemia (HS) disease is caused by –
  • Bacteria
  • Virus
  • Protozoa
  • Parasites
✅ Explanation: Hemorrhagic septicemia (HS) is a bacterial disease primarily affecting cattle and buffaloes. It is caused by the bacterium Pasteurella multocida.
Buffalo breeds have sickle-shaped horns-
  • Murrah
  • Jafarabadi
  • Pandharpuri
  • Surti
Surti ✅ Explanation: Surti buffaloes are known for their distinctive sickle-shaped horns that curve downwards and then upwards at the tip, forming a hook-like shape.
Best draft breed of cattle found in Rajasthan-
  • Tharparkar
  • Kankrej
  • Nagori
  • Gir
✅ Explanation: Nagori is a breed of cattle native to Rajasthan, known for its hardiness and strength, making it suitable for draft purposes (pulling carts or plows). 📌 Other Options Explanations:● Tharparkar: A dual-purpose breed (milk and draught) from the Thar Desert region. ● Kankrej: A dual-purpose breed from Gujarat, also used for draught. ● Gir: A Zebu dairy cattle breed originating in Gujarat.
Chicken breed native of Rajasthan-
  • Pratapdhan
  • Mewari
  • Kadaknath
  • Marwari
✅ Explanation: the Mewari breed is specifically native to the Mewar region of Rajasthan. Pratapdhan is a dual-purpose breed developed in Rajasthan.
Mating of closely related animals is called-
  • Inbreeding
  • Outbreeding
  • Crossbreeding
  • Outcrossing
✅ Explanation: Inbreeding is the mating of individuals that are closely related, such as siblings or parents and offspring. It is often used in selective breeding to increase the frequency of desired traits but can also lead to the expression of harmful recessive genes.
Breeding of sires of a given breed to non-descript females and their offspring for generation after generation
  • Grading-up
  • Cross breeding
  • Two breed crossing
  • Cross crossing
Explanation: Grading-up is a breeding system where sires (males) of a superior breed are repeatedly mated with females of a lower grade or non-descript breed and their female offspring. This process aims to improve the genetic quality of the lower grade population over several generations, gradually incorporating the desired traits from the superior breed.Other Options Explanations:Cross breeding: Involves mating individuals from two different breeds to produce offspring with a combination of traits from both parents.Two breed crossing: A type of crossbreeding involving two specific breeds.Cross crossing: A complex breeding system involving multiple breeds and backcrossing.
Selection on the basis of individual phenotypic performance is called?
  • Individual selection
  • Pedigree selection
  • Sib selection
  • Family Selection
Explanation: Individual selection is a breeding method where individuals are selected based solely on their own phenotypic performance (observable traits), without considering the performance of their relatives.Other Options Explanations:Pedigree selection: Selection based on the performance of an individual's ancestors or pedigree.Sib selection: Selection based on the performance of an individual's siblings.Family selection: Selection based on the average performance of a family group.
Best method of selection is-
  • Tandem selection
  • Independent culling level
  • Total Score
  • Family selection
Explanation: Total Score or Index Selection is often considered the best method of selection because it allows for simultaneous selection of multiple traits, weighing their economic importance. This leads to a more balanced and efficient improvement of the overall genetic merit of a population.Other Options Explanations:Tandem selection: Selection for one trait at a time, which can be slow and inefficient.Independent culling level: Individuals not meeting the minimum standard for any trait are rejected, which can lead to loss of potentially valuable individuals.Family selection: Selection based on the average performance of a family, which may not identify the best individuals within a family.
The act of parturition in a goat is called-
  • Lambing
  • Kidding
  • Calving
  • Farrowing
Explanation: Kidding is the specific term used to describe the act of giving birth in goats.Other Options Explanations:Lambing: The act of giving birth in sheep.Calving: The act of giving birth in cows or other bovines.Farrowing: The act of giving birth in pigs.
The indifference curve is based on the assumption of-
  • Ordinal Utility
  • Cardinal Utility
  • Nominal Utility
  • Positive Utility
Explanation: Indifference curves are a fundamental concept in microeconomics representing different combinations of two goods that provide a consumer with the same level of satisfaction or utility. The key assumption behind indifference curves is that utility is ordinal, meaning it can be ranked or ordered but not measured cardinally (with specific numerical values).
For those goods having relatively elastic demand, elasticity of demand will be-
  • One
  • Zero
  • Greater than one
  • Less than one
Explanation:Elastic Demand: When the demand for a good is relatively elastic, it means that the quantity demanded changes significantly in response to a change in price.Elasticity greater than 1: This indicates that the percentage change in quantity demanded is greater than the percentage change in price. In other words, consumers are very responsive to price changes.Other Options Explanations:One (Unit Elastic): The percentage change in quantity demanded is equal to the percentage change in price.Zero (Perfectly Inelastic): The quantity demanded does not change at all in response to a change in price.Less than one (Inelastic): The percentage change in quantity demanded is less than the percentage change in price. Consumers are less responsive to price changes.
Which of the following institutions came into existence in 1982?
  • RRBs
  • NABARD
  • ARDC
  • AFC
✅ Explanation:NABARD (National Bank for Agriculture and Rural Development) was established on 12th July 1982 by an Act of Parliament. It is an apex development bank in India that focuses on providing credit and other financial services for the development of agriculture and rural areas.📌 Other Options Explanations:RRBs (Regional Rural Banks): Established in 1975 to provide banking services in rural areas.ARDC (Agricultural Refinance and Development Corporation): Established in 1963, it was merged into NABARD in 1982.
As the number of marketing channels increases, the producer's share in consumer's rupee -
  • Decrease
  • Increase
  • Remains Steady
  • None of the above
✅ Explanation:As the number of marketing channels increases, it generally leads to a decrease in the producer's share in the consumer's rupee. This is because more intermediaries (wholesalers, retailers, etc.) are involved in the distribution process, each adding their own margins and costs, which ultimately increases the final price paid by the consumer.
The law of diminishing returns relates to-
  • Factor-Product relationship
  • Factor-Factor relationship
  • Product substitution
  • Factor-substitution
✅ Explanation:Law of Diminishing Returns: This law states that as you increase the input of one factor of production while keeping other factors constant, the marginal product (additional output) from each additional unit of input will eventually decrease.Factor-Product Relationship: The law of diminishing returns specifically describes how the output (product) changes in relation to changes in one input (factor) while other inputs are held constant.📌 Other Options Explanations:Factor-Factor relationship: This examines the relationship between different factors of production (e.g., labor and capital).Product substitution: Refers to consumers switching to alternative products when the price of one product increases.Factor-substitution: Refers to producers substituting one factor of production for another (e.g., using more machinery and less labor).
Discounting method of project analysis implies-
  • Future value of Present sum
  • Present value of Future sum
  • Present value increased by a given value
  • Future value reduced by a given value
✅ Explanation:Discounting is a financial technique used to determine the present value of future cash flows. It recognizes that money received in the future is worth less than the same amount received today due to the time value of money (potential to earn interest or returns).📌 Other Options Explanations:Future value of Present sum: This is the opposite of discounting, where the value of a current sum is calculated at a future point in time, considering interest or returns.
The Markets dealing with agricultural commodities at district headquarter are called-
  • Primary Wholesale Market
  • Seaboard Markets
  • Terminal Markets
  • Secondary Wholesale Markets
✅ Explanation:Markets located at district headquarters that deal with agricultural commodities are typically classified as Secondary Wholesale Markets. These markets act as intermediaries between primary markets (village-level markets) and terminal markets (large wholesale markets in major cities).📌 Other Options Explanations:Primary Wholesale Market: These markets are usually located in rural areas and are the first point of sale for farmers.Seaboard Markets: Markets located near the coast, primarily dealing with the export and import of goods.Terminal Markets: Large wholesale markets located in major cities, acting as the final link between producers and consumers.
Coefficient of variation is expressed as a percentage of-
  • AM/SD
  • SD/AM
  • SD/GM
  • GM/SD
✅ Explanation:The coefficient of variation (CV) is a statistical measure of relative variability. It is calculated as the standard deviation (SD) divided by the mean (AM) and expressed as a percentage.CV = (SD/AM) * 100📌 Other Options Explanations:AM/SD, SD/GM, and GM/SD: These options represent incorrect formulas for calculating the coefficient of variation.
In an RBD with 4 treatments and 5 replications, the degree of freedom for error is-
  • 10
  • 8
  • 9
  • 12
Option D: 12✅ Explanation:In a Randomized Block Design (RBD), the degree of freedom for error is calculated as:Degree of freedom (Error) = (Total number of observations - 1) - (Number of treatments - 1) - (Number of blocks - 1)In this case:Total number of observations = 4 treatments * 5 replications = 20Number of treatments = 4Number of blocks (replications) = 5Degree of freedom (Error) = (20-1) - (4-1) - (5-1) = 19 - 3 - 4 = 12
The Karl Pearson correlation coefficient will lie between-
  • 0, 1
  • -1, 0
  • -1, +1
  • -3, +3
✅ Explanation:The Karl Pearson correlation coefficient, often denoted by 'r', measures the strength and direction of the linear relationship between two variables. It always ranges from -1 to +1.-1: Indicates a perfect negative correlation (when one variable increases, the other decreases perfectly).0: Indicates no correlation between the two variables.+1: Indicates a perfect positive correlation (when one variable increases, the other also increases perfectly).