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Consider the following statements: (a) Coenzyme or metal ion that is tightly bound to enzyme protein is called prosthetic group. (b) A complete catalytic active enzyme with its bound prosthetic group is called holoenzyme. Select the correct option.

1. Both (a) and (b) are true.
2. (a) is true but (b) is false.
3. Both (a) and (b) are false.
4. (a) is false but (b) is true.

Correct answer: Both (a) and (b) are true.

Solution

A prosthetic group is a coenzyme or metal ion that is permanently or tightly attached to an enzyme. When the enzyme protein is combined with its required prosthetic group, the active complete form is called a holoenzyme.

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