Biology 30 – Mitosis And Meiosis Practice Test

What processes occur during interphase of mitosis?

Growth phase one (G1), Synthesis (S), and Growth phase 2 (G2) DNA replication occurs Mitosis begins Cytokinesis occurs

Correct Answer:

Growth phase one (G1), Synthesis (S), and Growth phase 2 (G2)

Explanation:

Interphase is the period before cell division when the cell grows, carries out its normal functions, and duplicates its DNA in preparation for mitosis. During interphase the cell goes through three subphases: G1, where growth and protein synthesis occur; S, where DNA replication happens; and G2, where the cell continues to grow and prepares for mitosis. The best answer lists all three subphases—G1, S, and G2—capturing the full set of interphase activities. DNA replication occurs in the S phase, which is included in that list. Mitosis and cytokinesis, on the other hand, happen after interphase, during the M phase, so statements claiming that mitosis or cytokinesis occurs during interphase aren’t correct.

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