The active site of an enzyme ____
a. is where the coenzyme is located
b. is a specific bulge or protuberance on an enzyme
c. is a groove or crevice in the structure of the enzyme complementary to the substrate
d. will react with only one substrate no matter how many molecules may resemble the shape of the substrate
e. rigidly resists any alteration of its shape
ANSWER: c
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