Q16 / 200 · NEET 2023 (All India) · Botany

Given below are two statements:

Statement I: During G0 phase of cell cycle, the cell is metabolically inactive.

Statement II: The centrosome undergoes duplication during S phase of the interphase.

In the light of the above statements, choose the most appropriate answer from the options given below:

  • Correct answer
    A
    Statement I is incorrect but Statemet II is correct
  • B
    Both Statement I and Statement II are correct
  • C
    Both Statement I and Statement II are incorrect
  • D
    Statement I is correct but Statemet II is incorrect

Solution

Some cells, after the mitotic phase exit from the G1 phase and enter the inactive stage called quiescent stage (G0) of the cell cycle. Cells in this stage remain metabolically active but no longer proliferate unless called on to do so depending on the requirement of the organism.

In the S phase of interphase, the cells duplicate their DNA. In animal cells, during the S phase, DNA replication begins in the nucleus, and the centriole duplicates in the cytoplasm.

Hence, the correct answer is option: 'A'.

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