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Consider the following statements: (A)...

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 apoenzyme. Select the correct option

A

(A) is false but (B) is true.

B

Both (A) and (B) are true.

C

A) is true but (B) is false.

D

Both (A) and (B) are false.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze the two statements provided and determine their validity. ### Step 1: Analyze Statement A - **Statement A**: "Coenzyme or metal ion that is tightly bound to enzyme protein is called prosthetic group." - **Explanation**: A prosthetic group is indeed a non-polypeptide unit that is tightly and permanently attached to an enzyme. However, coenzymes are typically not tightly bound; they are loosely associated with the enzyme and can dissociate after the reaction. Therefore, the statement incorrectly describes coenzymes as prosthetic groups. Thus, this statement is **false**. ### Step 2: Analyze Statement B - **Statement B**: "A complete catalytic active enzyme with its bound prosthetic group is called apoenzyme." - **Explanation**: An apoenzyme refers to the protein part of an enzyme without its cofactor (which may include a prosthetic group). When the apoenzyme is combined with its cofactor (including prosthetic groups), it forms a holoenzyme, which is the active form of the enzyme. Therefore, this statement is also **false**. ### Step 3: Conclusion - Since both statements A and B are false, the correct option is that both statements are incorrect. ### Final Answer The correct option is: **Both statements are false**. ---
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