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Cell Cycle and Cell Division · Question 61

AIPMT 2012 (Prelims)MCQEasy📈 Topic in 75% papers+4−1
1

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

Answer

(3) Prophase I during meiosis

Solution

The figure shows a pair of homologous chromosomes (each with two sister chromatids) in which non-sister chromatids exchange segments, i.e., crossing over.

As per NCERT, crossing over is the exchange of genetic material between two homologous chromosomes; it occurs during pachytene of prophase I of meiosis, and the sites are seen as chiasmata in diplotene.

∴ The stage shown is Prophase I during meiosis.

Answer: (3)

AIPMT 2012 (Prelims)

Keep practising — Cell Cycle and Cell Division

2

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

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

Select the correct option with respect to mitosis.

  1. Chromatids separate but remain in the centre of the cell in anaphase
  2. Chromatids start moving towards opposite poles in telophase
  3. Golgi complex and endoplasmic reticulum are still visible at the end of prophase
  4. Chromosomes move to the spindle equator and get aligned along equatorial plate in metaphase
AIPMT 2011 (Prelims)
4

During mitosis, ER and nucleolus begin to disappear at

  1. late prophase
  2. early metaphase
  3. late metaphase
  4. early prophase
AIPMT 2010 (Prelims)
5

Which stages of cell division do the following figures A and B represent respectively? [Figure]

  1. A Prophase, B Anaphase
  2. A Metaphase, B Telophase
  3. A Telophase, B Metaphase
  4. A Late anaphase, B Prophase
AIPMT 2010 (Prelims)
6

Synapsis occurs between

  1. mRNA and ribosomes
  2. spindle fibres and centromere
  3. two homologous chromosomes
  4. a male and a female gamete
AIPMT 2009
7

Given below is a schematic break-up of the phases/stages of cell cycle. Which one of the following is the correct indication of the stage/phase in the cell cycle? [figure]

  1. C - karyokinesis
  2. D - synthetic phase
  3. A - cytokinesis
  4. B - metaphase
AIPMT 2009
8

At what stage of the cell cycle are histone proteins synthesized in a eukaryotic cell?

  1. During G2 stage of prophase
  2. During S-phase
  3. During entire prophase
  4. During telophase
AIPMT 2005
9

Centromere is required for -

  1. Crossing over
  2. Movement of chromosomes towards poles
  3. Transcription
  4. Cytoplasmic cleavage
AIPMT 2005
10

In the somatic cell cycle

  1. in G1 phase DNA content is double the amount of DNA present in the original cell
  2. DNA replication takes place in S phase
  3. a short interphase is followed by a long mitotic phase
  4. G2 phase follows mitotic phase
AIPMT 2004
11

If you are provided with root-tips of onion in your class and are asked to count the chromosomes, which of the following stages can you most conveniently look into?

  1. Metaphase
  2. Telophase
  3. Anaphase
  4. Prophase
AIPMT 2004

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