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NDA 1 2024 GAT, question 82

Topic: Biology

Q82

Consider the following statements :

  1. DNA replication takes place when chromatin is opened up.

  2. Chromatin organises itself into rod-shaped chromosomes before cell division.

  3. Both prokaryotes and eukaryotes have the same process for cell division.

Which of the statements given above is/are correct ?

  1. (a) 1 only
  2. (b) 1 and 2 onlyCorrect answer
  3. (c) 1, 2 and 3
  4. (d) 3 only

Solution.

Answer: (b) 1 and 2 only

  1. Chromatin must become accessible for DNA replication, and it condenses into visible chromosomes before nuclear division, supporting statements 1 and 2.
  2. Prokaryotes usually divide by binary fission; eukaryotic nuclear division uses mitosis or meiosis.
  3. Their processes are not the same, so statement 3 is false.