Cell Cycle: Phases and Checkpoints · Zoology

Which cell cycle phase is absent in rapidly dividing embryonic cells?

  1. G1 phase
  2. S phase, the DNA synthesis period
  3. G2 phase, the pre-mitotic gap
  4. M phase, the mitotic division
Show answer and explanation

Correct answer: G1 phase

Rapidly dividing embryonic cells often lack a G1 phase. This allows faster progression through the cell cycle with minimal growth periods.

Difficulty: Medium Question 17 of 20

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