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Cell Cycle and Cell Division · Question 40

NEET 2017MCQEasy📈 Topic in 50% papers+4−1
1

Which of the following options gives the correct sequence of events during mitosis?

  1. Condensation Nuclear membrane disassembly Arrangement at equator Centromere division Segregation Telophase
  2. Condensation Crossing over Nuclear membrane disassembly Segregation Telophase
  3. Condensation Arrangement at equator Centromere division Segregation Telophase
  4. Condensation Nuclear membrane disassembly Crossing over Segregation Telophase

Answer

(1) Condensation Nuclear membrane disassembly Arrangement at equator Centromere division Segregation Telophase

Solution

As per NCERT, during prophase the chromosomal material condenses, and by the end of prophase the nuclear envelope disintegrates.

⇒ In metaphase the chromosomes are arranged at the equator (metaphase plate).

⇒ In anaphase the centromeres split and the chromatids separate (segregate) and move to opposite poles.

⇒ Telophase follows.

Crossing over occurs only in meiosis (pachytene), not in mitosis.

∴ Condensation Nuclear membrane disassembly Arrangement at equator Centromere division Segregation Telophase.

Answer: (1)

NEET 2017

Keep practising — Cell Cycle and Cell Division

2

Anaphase Promoting Complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cell. If APC is defective in a human cell, which of the following is expected to occur?

  1. Chromosomes will be fragmented.
  2. Chromosomes will not segregate.
  3. Recombination of chromosome arms will occur.
  4. Chromosomes will not condense.
NEET 2017
3

Spindle fibres attach on to

  1. centromere of the chromosome
  2. kinetosome of the chromosome
  3. telomere of the chromosome
  4. kinetochore of the chromosome.
NEET 2016 (Phase 1)
4

Which of the following is not a characteristic feature during mitosis in somatic cells?

  1. Chromosome movement
  2. Synapsis
  3. Spindle fibres
  4. Disappearance of nucleolus
NEET 2016 (Phase 1)
5

In meiosis crossing over is initiated at

  1. zygotene
  2. diplotene
  3. pachytene
  4. leptotene.
NEET 2016 (Phase 1)
6

During cell growth, DNA synthesis takes place on

  1. S-phase
  2. G1-phase
  3. G2-phase
  4. M phase
NEET 2016 (Phase 2)
7

When cell has stalled DNA replication fork, which checkpoint should be predominantly activated?

  1. G1/S
  2. G2/M
  3. M
  4. Both G2/M and M
NEET 2016 (Phase 2)
8

Match the stages of meiosis in column I to their characteristic features in column II and select the correct option using the codes given below.

  1. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
  2. (a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)
  3. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
  4. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
NEET 2016 (Phase 2)
9

Arrange the following events of meiosis in correct sequence (i) Crossing over (ii) Synapsis (iii) Terminalisation of chiasmata (iv) Disappearance of nucleolus

  1. (i), (ii), (iii), (iv)
  2. (ii), (iii), (iv), (i)
  3. (ii), (i), (iv), (iii)
  4. (ii), (i), (iii), (iv)
AIPMT 2015
10

A somatic cell that has just completed the S phase of its cell cycle, as compared to gamete of the same species, has

  1. twice the number of chromosomes and four times the amount of DNA
  2. four times the number of chromosomes and twice the amount of DNA
  3. twice the number of chromosomes and twice the amount of DNA
  4. same number of chromosomes but twice the amount of DNA.
AIPMT 2015 (Cancelled)
11

Select the correct option.

  1. (A) - (i); (B) - (ii); (C) - (v); (D) - (iv)
  2. (A) - (ii); (B) - (iii); (C) - (iv); (D) - (v)
  3. (A) - (ii); (B) - (i); (C) - (iii); (D) - (iv)
  4. (A) - (ii); (B) - (iii); (C) - (v); (D) - (iv)
AIPMT 2015 (Cancelled)

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