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Cell Cycle and Cell Division · Question 65

AIPMT 2010 (Prelims)MCQMedium📈 Topic in 50% papers+4−1
1

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

Answer

(4) A Late anaphase, B Prophase

Solution

Fig. A: the chromosomes have separated and moved to the two opposite poles along the spindle fibres, and the cell is elongated; this is late anaphase.

Fig. B: the nucleus (nuclear envelope) is still present with condensing chromatin, and the two asters (centrosomes) are moving towards opposite poles; this is prophase.

As per NCERT, in prophase the centrosomes, each with radiating microtubules (asters), move towards opposite poles, and chromosomal material condenses.

Answer: (4)

AIPMT 2010 (Prelims)

Keep practising — Cell Cycle and Cell Division

2

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
3

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
4

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
5

Centromere is required for -

  1. Crossing over
  2. Movement of chromosomes towards poles
  3. Transcription
  4. Cytoplasmic cleavage
AIPMT 2005
6

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
7

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
8

Which one of the following precedes reformation of the nuclear envelope during M phase of the cell cycle?

  1. Decondensation from chromosomes, and reassembly of the nuclear lamina
  2. Transcription from chromosomes, and reassembly of the nuclear lamina
  3. Formation of the contractile ring, and formation of the phragmoplast
  4. Formation of the contractile ring, and transcription from chromosomes
AIPMT 2004
9

Mitotic spindle is mainly composed of which protein?

  1. Actin
  2. Myosin
  3. Tubulin
  4. Myoglobin
AIPMT 2002
10

In which stage of cell cycle, DNA replication occurs?

  1. G1-phase
  2. S-phase
  3. G2-phase
  4. M-phase
AIPMT 2000

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