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

Question

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

Quizplus · Accepted Answer

The active site of an enzyme is a groove or crevice in the structure of the enzyme that is complementary to the substrate. This allows the enzyme to selectively bind to and react with its specific substrate. The active site is not where the coenzyme is located (A), nor is it a specific bulge or protuberance on an enzyme (B). While enzymes do have specificity for certain substrates, this does not necessarily mean they will react with only one substrate (D) as some enzymes can have multiple substrates. Additionally, the active site is not rigid and can undergo conformational changes to accommodate the substrate (E).

The Active Site of an Enzyme ____