Which molecule can enter the Krebs cycle reactions?

a. glucose


b. pyruvate
c. carbon dioxide
d. NADH
e. acetyl-CoA


ANSWER: e

Biology & Microbiology

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Which of the following plants would be most

susceptible to the effects of acid rain?

a. alpine fir tree b. valley bluegrass c. cacti d. chaparral manzanita e. tundra lichen

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Different molecular forms of the same gene are

__________. Fill in the blank(s) with the appropriate word(s).

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How is a carrier protein different from a channel protein?

A. Carriers use ATP. B. Carriers undergo a conformation change. C. Transport through a carrier depends on concentration gradients. D. Transport through a carrier does not depend on the random motion of molecules.

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