Which cell cycle checkpoint controls whether a cell can enter mitosis?

a. G1 checkpoint
b. M checkpoint
c. G2 checkpoint
d. S checkpoint

c. G2 checkpoint

Biology & Microbiology

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In T4 phages, which of the following makes the initial contact with the appropriate receptor site?

A. Tail tube B. Collar C. Base plate D. Tail fiber

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What type of plant is corn?

a. C3 b. C4 c. CAM d. it becomes a CAM plant if grown in the desert e. it becomes a C3 plant if grown in cold climates

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After a meal,

a. ATP production slows. b. blood glucose levels remain constant. c. insulin levels rise. d. glycogen is used. e. glucagon levels rise

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The evolution of populations due to chance is

A. natural selection. B. genetic drift. C. gene flow. D. has more effect in large populations than in small populations. E. genetic variation.

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Biology & Microbiology