A Levels Biology (9700)•9700/13/O/N/22
Explanation
Interphase precedes mitosis in the cell cycle
Steps:
- Recall interphase as the longest phase of the cell cycle, consisting of G1 (growth), S (DNA synthesis), and G2 (preparation for mitosis).
- Identify diagram stages: assume 1 is G1, 2 is S, 3 is prophase (mitosis start), 4 is metaphase (mitosis).
- Match choices to interphase: only G1 and S (stages 1 and 2) occur entirely within interphase.
- Confirm no mitosis stages (3 or 4) belong to interphase.
Why A is correct:
- Interphase definition includes G1 and S phases for cell growth and DNA replication before mitosis.
Why the others are wrong:
- B: Stage 3 is prophase, part of mitosis, not interphase.
- C: Stage 2 is S (interphase), but 4 is metaphase (mitosis).
- D: Stages 3 and 4 are both mitosis phases, post-interphase.
Final answer: A
Topic: Replication and division of nuclei and cells
Practice more A Levels Biology (9700) questions on mMCQ.me