PYQSide ExamsMy practice

Cell Cycle and Cell Division · Question 44

NEET 2016 (Phase 1)MCQMedium📈 Topic in 75% papers+4−1
1

In meiosis crossing over is initiated at

  1. zygotene
  2. diplotene
  3. pachytene
  4. leptotene.

Answer

(3) pachytene

Solution

As per NCERT, during pachytene the bivalent chromosomes clearly appear as tetrads, recombination nodules appear and crossing over occurs between non-sister chromatids of homologous chromosomes.

⇒ Zygotene only forms the synaptonemal complex (synapsis); diplotene shows chiasmata, where crossing over has already taken place.

∴ Crossing over is initiated at pachytene.

Answer: (3)

NEET 2016 (Phase 1)

Keep practising — Cell Cycle and Cell Division

2

During cell growth, DNA synthesis takes place on

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

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)
4

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)
5

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
6

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)
7

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)
8

During which phase(s) of cell cycle, amount of DNA in a cell remains at 4C level if the initial amount is denoted as 2C?

  1. G0 and G1
  2. G1 and S
  3. Only G2
  4. G2 and M
AIPMT 2014
9

In 'S' phase of the cell cycle

  1. amount of DNA doubles in each cell
  2. amount of DNA remains same in each cell
  3. chromosomes number is increased
  4. amount of DNA is reduced to half in each cell.
AIPMT 2014
10

The enzyme recombinase is required at which stage of meiosis?

  1. Pachytene
  2. Zygotene
  3. Diplotene
  4. Diakinesis
AIPMT 2014
11

The complex formed by a pair of synapsed homologous chromosomes is called

  1. bivalent
  2. axoneme
  3. equatorial plate
  4. kinetochore.
NEET 2013

All Cell Cycle and Cell Division PYQs →

PDFDownload Cell Cycle and Cell Division PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All NEET Botany chapters
Class 11The Living WorldBiological ClassificationPlant KingdomMorphology of Flowering PlantsAnatomy of Flowering PlantsCell: The Unit of LifeCell Cycle and Cell DivisionTransport in PlantsMineral NutritionPhotosynthesis in Higher PlantsRespiration in PlantsPlant Growth and Development
Class 12Reproduction in OrganismsSexual Reproduction in Flowering PlantsPrinciples of Inheritance and VariationMolecular Basis of InheritanceStrategies for Enhancement in Food ProductionMicrobes in Human WelfareOrganisms and PopulationsEcosystemBiodiversity and ConservationEnvironmental Issues
Other chaptersBiomolecules (Biology)