SAT II Biology M : Cell Cycle

Study concepts, example questions & explanations for SAT II Biology M

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Example Questions

Example Question #1 : Cell Cycle

With regards to mitosis, which checkpoint is considered the most important?

Possible Answers:

G1

S

G2

M

G0

Correct answer:

G1

Explanation:

G1 is considered to be the most important checkpoint in the cell cycle. G1 precedes S and G2, so it decides if the cell is ready to commit the resources to go through the S phase, G2 phase, M phase, and then finally division. S is crucial for the replication of cellular materials and the duplication of DNA, but if the cell cannot pass G1, then it will never reach S phase.

Example Question #2 : Cell Cycle

Which three phases are included in Interphase?

Possible Answers:

M, G0, S

M, S, and G

G0, G1, and G2 

G1, S, and G2

G0, S, and G1

Correct answer:

G1, S, and G2

Explanation:

During interphase, you have G1, or gap 1, in which the cell grows. Then you have S phase, in which the cell synthesizes its DNA. Finally, you have G2, or gap 2, in which the cell continues to grow again.

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