Question

Given above 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?

• A. B - Metaphase
• B. C - Karyokinesis
• C. D - Synthetic phase
• D. A - Cytokinesis

Answer 1

The correct option is C D - Synthetic phase

• The cell cycle is comprised of a long interphase and a short division phase. The long interphase comprises of G${}_1$ or first growth phase, S or synthetic phase, and G${}_2$ or second growth phase.
• Anaphase (represented by B) is the third phase of karyokinesis during mitosis.
  
• The process by which the nucleus of the parent cell divides into two daughter nuclei is known as karyokinesis (represented by A).
  
• The process by which the cytoplasm of the parent cell, divides into two daughter cells is cytokinesis and is represented by C in the question.
  
• In S phase, DNA of each chromosome replicates followed by the synthesis of histones. The phase marked D corresponds to the S phase of a typical cell cycle.

So, the correct answer is option C.