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PCAT Biological Processes – Meiosis and Mitosis

Which of the following phases are common to cells undergoing meiosis and mitosis?

  1. G0 phase
  2. G2 phase
  3. S phase

 

  1. I only
  2. I and II only
  3. II and III only
  4. I, II, and III
Explanation

This question asks the examinee to determine a phase within the cell life cycle that is common to both mitotic-dividing cells and meiotic-dividing cells. The cell cycle is composed of interphase and M phase. In mitotic-dividing cells, interphase includes G1 phase, S phase, G2 phase, and in highly specialized cells, such as neurons, a G0 phase. Similarly, meiotic-dividing cells include interphase and M phase, but germ cells do not exist in growth arrest phase (G0). Thus, II and III are correct making answer choice C the best answer.

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