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Cell Cycle and Cell Division · Question 71

AIPMT 2004MCQEasy📈 Topic in 50% papers+4−1
1

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

Answer

(1) Metaphase

Solution

As per NCERT, metaphase is the stage at which the morphology of chromosomes is most easily studied: chromosomes are maximally condensed and lie on the metaphase plate.

∴ The chromosomes are counted most conveniently at metaphase.

Answer: (1)

AIPMT 2004

Keep practising — Cell Cycle and Cell Division

2

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
3

Mitotic spindle is mainly composed of which protein?

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

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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