Question

Consider the following statements about enzymes.

(A) Coenzyme or metal ion that is tightly bound to enzyme protein is called the prosthetic group.

(B) A complete catalytic active enzyme with its bound prosthetic group is called apoenzyme.

Select the correct option.

• A. Both (A) and (B) are true.
• B. (A) is true but (B) is false.
• C. Both (A) and (B) are false.
• D. (A) is false but (B) is true.

Answer 1

The correct option is C

Both (A) and (B) are false.

The correct option is C.

Explanation for correct answer:

1. Enzymes are proteins that function as biological catalysts and accelerate chemical reactions.
2. Prosthetic groups are functional groups that tightly bind to a protein via a covalent bond.
3. These groups provide a structural property to the enzyme molecule and include metal ions, vitamins, lipids, or sugars.
4. An apoenzyme is the protein part of the enzyme and it combines with a cofactor to form a holoenzyme.
5. The apoenzyme is responsible for the specificity of the enzyme and requires a cofactor to be activated.

Explanation for incorrect answer:

Option A:

It is incorrect as both statements are false.

Option B:

It is incorrect as both statements are false.

Option D:

It is incorrect as both statements are false.

Final answer: Both (A) and (B) is false.