Which of the following statements is true of a hypothetical enzyme that catalyzes glyceraldehyde?
A) It has two binding sites: one specific for -OH and the second specific for -CHO.
B) It has two binding sites: one specific for -COOH and the second specific for -CHO.
C) It has three binding sites: one specific for -H, the second specific for -COOH, and the third specific for -CHO.
D) It has three binding sites: one specific for -H, the second specific for -OH, and the third specific for -CHO.

Question

Quizplus · Accepted Answer

Glyceraldehyde has three functional groups: -H, -OH, and -CHO. Therefore, the hypothetical enzyme that catalyzes glyceraldehyde should have binding sites specific for each of these three functional groups. Choice D is the only option that lists three binding sites, each specific for -H, -OH, and -CHO. The other options have binding sites for functional groups that are not present in glyceraldehyde (-COOH in B and -OH and -COOH in A).

Which of the Following Statements Is True of a Hypothetical