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Cell Cycle and Cell Division · Question 52

AIPMT 2014MCQEasy📈 Topic in 62% papers+4−1
1

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.

Answer

(1) amount of DNA doubles in each cell

Solution

As per NCERT, S (synthesis) phase marks the period during which DNA synthesis or replication takes place.

⇒ The amount of DNA per cell doubles (2C → 4C).

∵ Each chromosome now has two sister chromatids held at one centromere, the chromosome number does not increase.

Answer: (1)

AIPMT 2014

Keep practising — Cell Cycle and Cell Division

2

The enzyme recombinase is required at which stage of meiosis?

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

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

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

A stage in cell division is shown in the figure. Select the answer which gives correct identification of the stage with its characteristics. [Figure]

  1. Telophase Endoplasmic reticulum and nucleolus not reformed yet.
  2. Telophase Nuclear envelope reforms, Golgi complex reforms.
  3. Late anaphase Chromosomes move away from equatorial plate, Golgi complex not present.
  4. Cytokinesis Cell plate formed, mitochondria distributed between two daughter cells.
NEET 2013
5

During meiosis I, the chromosomes start pairing at

  1. zygotene
  2. pachytene
  3. diplotene
  4. leptotene.
NEET 2013 (Karnataka)
6

During the metaphase stage of mitosis, spindle fibres attach to chromosomes at

  1. kinetochore
  2. both centromere and kinetochore
  3. centromere, kinetochore and areas adjoining centromere
  4. centromere.
NEET 2013 (Karnataka)
7

A stage of mitosis is shown in the diagram. Which stage is it and what are its characteristics? [Figure]

  1. Anaphase - Centromeres split and chromatids separate and start moving away.
  2. Late prophase - Chromosomes move to spindle equator.
  3. Metaphase - Spindle fibers attached to kinetochores, centromeres split and chromatids separate.
  4. Metaphase - Chromosomes moved to spindle equator, chromosomes made up of two sister chromatids.
NEET 2013 (Karnataka)
8

Identify the meiotic stage in which the homologous chromosomes separate while the sister chromatids remain associated at their centromeres.

  1. Metaphase I
  2. Metaphase II
  3. Anaphase I
  4. Anaphase II
AIPMT 2012 (Mains)
9

During gamete formation, the enzyme recombinase participates during

  1. metaphase I
  2. anaphase II
  3. prophase I
  4. prophase II.
AIPMT 2012 (Prelims)
10

Given below is the representation of a certain event at a particular stage of a type of cell division. Which is this stage? [Figure]

  1. Prophase of Mitosis
  2. Both prophase and metaphase of mitosis
  3. Prophase I during meiosis
  4. Prophase-II during meiosis
AIPMT 2012 (Prelims)
11

At metaphase, chromosomes are attached to the spindle fibres by their

  1. satellites
  2. secondary constrictions
  3. kinetochores
  4. centromeres.
AIPMT 2011 (Mains)

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