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Multiple Choice
Which of the following functional groups is commonly found in enzymes and is crucial for their catalytic activity?
A
Carboxyl group
B
Hydroxyl group
C
Amine group
D
Sulfhydryl group
Verified step by step guidance
1
Identify the functional groups listed in the problem: Carboxyl group, Hydroxyl group, Amine group, and Sulfhydryl group.
Understand the role of each functional group in biological molecules: Carboxyl groups are often involved in forming esters and amides, Hydroxyl groups are found in alcohols and sugars, Amine groups are present in amino acids and proteins.
Recognize that the Sulfhydryl group, represented as \( \text{-SH} \), is a functional group containing a sulfur atom bonded to a hydrogen atom.
Learn that the Sulfhydryl group is crucial in enzymes because it can form disulfide bonds (\( \text{-S-S-} \)) which are important for the stabilization of protein structures.
Conclude that the Sulfhydryl group is commonly found in enzymes and is crucial for their catalytic activity due to its ability to form disulfide bonds, which help maintain the enzyme's active conformation.