Given below is a schematic break-up of the phases / stages of cell cycle : Which one of the following is the…

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 ?
  1. A-Cytokinesis
  2. B-Metaphase
  3. C-Karyokinesis
  4. D-Synthetic phase

Solution

In a cell cycle, there are two main phases - interphase and mitotic phase. Interphase is divided into 3 stage G1, S and G2. G1 is the first growth phase. S is a synthesis phase and G2 is second growth phase. The M-phase starts with the nuclear division, corresponding to the separation of daughter chromosomes (karyokinesis) and usually ends with the division of cytoplasm (cytokinesis). Mitosis too is divided into four subsequent stages; prophase, metaphase, anaphase and telophase. Therefore, A is karyokinesis, B is metaphase and D is synthesis phase which is the correct option.

Asked in: NEET 2009 (Mains)

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