Which molecule can enter the Krebs cycle reactions?
a. glucose
b. pyruvate
c. carbon dioxide
d. NADH
e. acetyl-CoA
ANSWER: e
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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.
Restriction endonucleases were discovered by
A. Jackson, Symons, and Berg. B. Boyer and Cohen. C. Temin and Baltimore. D. Arber and Smith.
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
Different molecular forms of the same gene are
__________. Fill in the blank(s) with the appropriate word(s).