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All of the following statements are true...

All of the following statements are true for the typical eukaryotic cell cycle EXCEPT:

A

The S phase is far removed from cell division.

B

`G_(1)`occurs after the S phase.

C

The shortest phase in terms of time is usually M.

D

Many of the enzymes necessary for DNA replication are typically produced during `G_(1)`

Text Solution

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The correct Answer is:
To solve the question regarding the statements about the typical eukaryotic cell cycle, we will analyze each statement one by one to identify which one is incorrect. ### Step-by-Step Solution: 1. **Understanding the Cell Cycle Phases**: - The eukaryotic cell cycle consists of several phases: G1 (Gap 1), S (Synthesis), G2 (Gap 2), and M (Mitosis). - G1 is the first phase where the cell grows and prepares for DNA replication. - The S phase is where DNA replication occurs. - G2 is the phase following S where the cell prepares for mitosis. - M phase is where cell division occurs. 2. **Evaluating the Statements**: - **Statement 1**: "The S phase is far removed from cell division." - This statement is true because the S phase (DNA replication) occurs before the M phase (cell division). - **Statement 2**: "Life occurs after the S phase." - This statement is incorrect. The cell cycle progresses from G1 to S to G2, and life processes continue throughout the cell cycle, not just after the S phase. Therefore, this statement does not accurately reflect the order of the phases. - **Statement 3**: "The shortest phase in terms of time is usually M phase." - This statement is true. The M phase is indeed the shortest phase of the cell cycle, typically comprising about 5% of the total cycle time. - **Statement 4**: "Many of the enzymes necessary for DNA replication are typically produced during G1." - This statement is true. Enzymes required for DNA replication are synthesized during the G1 phase in preparation for the S phase. 3. **Conclusion**: - The only statement that is incorrect is Statement 2: "Life occurs after the S phase." This is not true as the cell cycle continues with G2 after S phase, and life processes are ongoing throughout the entire cycle. ### Final Answer: The statement that is NOT true for the typical eukaryotic cell cycle is: **"Life occurs after the S phase."** ---
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