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  • The protein portion of an enzyme is called: A) Prosthetic group B) Cofactor C) Coenzyme D) Apoenzyme

Q.116)  The protein portion of an enzyme is called:

A) Prosthetic group

B) Cofactor

C) Coenzyme

D) Apoenzyme

Answers (1)

best_answer

Q.116) Apoenzyme is the protein portion of an enzyme that is inactive on its own.

It requires a non-protein component (cofactor or coenzyme) to become an active enzyme, called a holoenzyme.

Let’s look at the other options:

(1) Prosthetic group – A tightly bound, non-protein part of an enzyme (often organic) essential for activity.

(2) Cofactor – A general term for non-protein helpers, can be metal ions or organic molecules.

(3) Coenzyme – A loosely bound organic cofactor, often derived from vitamins.
Hence, the correct answer is option (4): Apoenzyme.

 

Posted by

Parbin Huda Baruah

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