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Question 33
Multiple Choice
arrowQuestion 33arrow
Multiple Choice

Use the following information to answer the next questions.
In the presence of oxygen, the three-carbon compound pyruvate can be catabolized in the citric acid cycle. First, however, the pyruvate 1) loses a carbon, which is given off as a molecule of CO2, 2) is oxidized to form a two-carbon compound called acetate, and 3) is bonded to coenzyme A.
-How does pyruvate enter the mitochondrion?


A)active transport
B)diffusion
C)facilitated diffusion
D)through a channel
E)through a pore

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