Cell Division — Agri Master Mind

In case of plants, the mitosis is involved in which of the following?
  • Microgametogenesis
  • Megagametogenesis
  • Root and shoot growth
  • All of the above
Which of the following is the shortest stage of cell cycle?
  • Anaphase
  • S
  • Metaphase
  • G1
Meiotic division of one cell gives rise to how many haploid cells?
  • 2
  • 4
  • 8
  • 16
During 1882, the term mitosis was first used by which of the following?
  • Sutton
  • Flemming
  • Strausberger
  • Boveri
Which of the following is the longest stage of cell cycle?
  • G1
  • S
  • Metaphase
  • Anaphase
In which organism, meiosis take place shortly after the formation of zygotes?
  • Many fungi
  • Chlamydomonas
  • Yeast
  • All of the above
Which of the following events occurs during metaphase of meiosis I ?
  • Chiasma terminalization
  • Arrangement of bivalents at equatorial plate
  • Crossing over
  • Separation of homologous chromosomes
Crossing over involves which of the following events ? DNA cleavage(=breakage) Ligation(=reunion) DNA degradation DNA synthesis
  • I,II
  • I,II,III,IV
  • I,II,III
  • I,II,IV
Synaptonemal complex is formed in which of the following substages of meiosis I ?
  • Zygotene
  • Pachytene
  • Leptotene
  • Diplotene
The period from one cell division to the next is called, which of the following?
  • Cell cycle
  • Cell period
  • Cell generation
  • Grand period
Cyclins were discovered by which of the following?
  • Draetta and coworkers
  • Watson and coworkers
  • Weiner and coworkers
  • Evans and coworkers
Which of the following best describes M phase kinase?
  • A kinase
  • A protein kinase
  • A cyclin- dependent kinase
  • A cyclin- dependent protein kinase
In which of the following, mitosis tales place?
  • Pollen mother cell
  • Pollen
  • Both (b) and (c)
  • Megaspore
Meiosis leads to the production of which of the following?
  • Haploid cells (usually, gametes)
  • New combinations of genes
  • Lots of genetic variation
  • All of the above
During which of the following stages histones are synthesized?
  • G1
  • S
  • G2
  • Prophase
In adults animals, mitosis is usually concerned with the production of which of the following?
  • Outer skin cells
  • Bloods cells
  • Gut epithelium
  • all of the above
In plants, mitosis is confined to meristematic tissues of which of the following?
  • Root-tips and shoot-tips
  • Young leaves and cambium
  • Flower buds
  • All of the above
Which of the following is not correct about mitotic cell division?
  • It produces genetic variation.
  • Mitosis leads to the production of two daughter cells from each parent cell.
  • It is involved in the production of new organs like roots, shoots, and leaves in plants.
  • It involves separation of sister chromatids only.
Consider the order of following terms related to different stages of mitotic cell division: Anaphase, interphase, prophase, metaphase, telophase. Select the correct order in cell cycle from the options listed below:
  • (a) Interphase → metaphase → anaphase → telophase → prophase
  • (b) Interphase → prophase → metaphase → telophase → anaphase
  • (c) Interphase → prophase → metaphase → anaphase telophase
  • (d) Prophase → metaphase → interphase → anaphase →telophase
The metaphase of mitotic cell division is characterized by which of the following ? 1. Disappearance of nuclear membrane and nucleolus. II. Arrangement of highly condensed chromosomes on the equatorial plate. III. Presence of spindle apparatus. IV. Absence of relational coiling between sister chromatids.
  • I. II. IV
  • I, II. III, IV
  • II, III, IV
  • I, II, III
Which of the following are the significant events of the first meiotic division ? 1. Pairing between homologous chromo-somes. II. Crossing over between non-sisterchromatids of homologous chromo- somes. III. Arrangement of bivalents on equatorial plate. IV. Separation of homologous chromosomes and their migration towards opposite poles.
  • I, II, III, IV
  • I, III, IV
  • I, II, III
  •  II, III, IV
The most likely mechanism of crossing over involves which of the following?
  • Two single-strand breaks
  • One double-strand break
  • Two double-strand breaks
  • Copy-choice DNA replication
Which of following pairs depicts a doubtful relationship? (
  • Synaptonemal complex and crossing (b) Pairing between homologous chromo-over.
  • somes and regular distribution of chromosomes.
  • Separation of homologous chromosomes and segregation of genes.
  • One round of DNA synthesis followed by two nuclear divisions and reduction in chromosome number
Inactivation of M phase kinase, following the onset of M phase, begins with which of the following?
  • (a) Phosphorylation
  • (b) Cyclin destruction
  • (c) Dephosphorylation
  • (d) All of the above
A single cell in each ovule differentiates into which of the following?
  • Microspore mother cell
  • Megaspore
  • Megaspore mother cell
  • Adventitious embryo
The concentration of G₂ cyclins is the highest during which stage of mitosis?
  • G₁ phase
  • G₂ phase
  • S phase
  • M phase
M phase kinase activation involves the monitoring of which of the following?
  • Completeness of DNA replication
  • Absence of DNA damage.
  • Increase in cell mass.
  • All of the above.
Which is the correct option about crossing over? 1. Heteroduplex regions are produced. recombinant joints per recombi- II. Two nation event are formed. III. Formation of hybrid DNA always leads to recombination. IV. Gene conversion may occur due to crossing over.
  • I, II, IV
  • I, II, III
  • II, III
  • I, II, III, IV
Which of the following is monitored during cell cycle regulation?
  • Completeness of DNA replication
  • Doubling of cell size
  • Absence of DNA damage
  • All of the above
Which of the following cyclins is regulated by proteolytic destruction after M phase initiation?
  • Cyclins D and E
  • Cyclins A and B
  • Cyclins B
  • Cyclins A