Robert brown discovered nucleus in the cells of which of the following?
tradescantia
Pectin is hydrolysed by which of the following enzymes?
All of the above
Lysosomes contain which of the following hydrolytic enzyme?
All of the above
Ribosomes are found in which of the following?
All of the above
Robert hook is famous for the discovery of which of the following?
Cell
Who discovered mitochondria?
Hollicker
Which of the following are surrounded by two membranes?
All of the above
Which of the following organelles does not have DNA?
Lysosome
Which of the following is the main function of chloroplasts?
Photosynthesis
Mitochondria do not occur in which of the following?
Bacteria
Which of the following cells of blood do not contain nucleus?
Platelets (thrombocytes)
The vacuoles are filled with which of the following?
All of the above
In the presence of low concentration of mg2+ ion prokaryotic ribosomes dissociate into which of the following?
50S & 30S
Ribosomes are essential for the synthesis of which of the following?
Protein
Which of the following organisms is not a prokaryote ?
Yeast
The first compound microscope was constructed by which of the following ?
Z. Jenson and H. Jenson
Which of the following may contain more than one nucleus per cell ?
Fungi
The plastids, which take part in the synthesis and storage of fats are called which of the following ?
Elaioplasts
Which of the following organelles is involved in ATP production by photo- phosphorylation?
Chloroplasts
A virus consists of which of the following?
Nucleic acid and protein
Which of the following are the main constituents of primary cell wall?
Hemicellulose and cellulose
Ribosomes are composed of which of the following?
RNA and protein
Which of the following values represents the size of plant animal ribosomes ?
80S
The chloroplasts of higher plants contain which of the following pigment(s)?
All of the above
Leucoplasts are colourless plastids and function in the storage of which of thefollowing?
Starch and fats
Which of the following is the main function of nucleoli ?
Production of ribosomes
Which of following does not contain DNA?
Golgi body
Which of the following pigments is responsible for the red colour of tomato fruits?
Lycopene
Which of the following provides genetic information for cell function?
All of the above
Which of the following is the shape of chloroplasts of higher plant?
Discoid/ellipsoidal
During 1839, Schlieden and Schwan jointly proposed which of the following theories ?
Cell theory
Which of the following is not correct about fluid-mosaic model of biological membranes? .
The positions of protein molecules are relatively fixed
In which of the following organelles,phosphorylation is a common reaction?
Both (a) and (b)
Which of the following is correct about B cells?
All of the above.
Which of the following are surrounded by two membranes ?
All of the above
Among those given below, which one lacks nucleus ?
Sieve cells of phloem
Which of the following is the main control centre of a cell?
Nucleus
During 1897, the term mitochondria was first used by which of the following ?
Benda
The first electron microscope was constructed by which of the following?
Under light microscope, we can not amine cell structures below the size of which of the following?
. Which of the following is an example of secondary lymphoid tissue?
All of the above
Which of the following constitutes plant cells? I Cell wall II Nucleus III. Cytoplasm IV. Vacuoles
I, II, III, IV
Which of the following is correct about T cells ? IT lymphocytes mature in the thymus. II. Mature T cells migrate via peripheral lymphoid tissues. III. These cells mediate activation of B cells.
I. II. III
Which of the following values represents the size of plant animal ribosomes ?
80S
The enzymes for the oxidation of amino acids, fatty acids, and Kreb's cycle are present in which of the following?
Mitochondrial matrix
The chloroplasts of higher plants contain which of the following pigment(s)?
All of the above
Which of the following is the most important for growth and synthesis of protoplasm?
Nucleus
. Which of the following cell constituents is non-living? I Cell wall II. Protoplasm III. Vacuole IV. Cytoplasm
I, III
When a primary lysosome fuses with a food vocuole, it is called which of the following?
Secondary lysosome
Which of the following organelles occurs only in plants ?
Plastid