Question

Given below are two statements: Assertion (A): Proteins are made up of alpha amino acids. Reason (R): During denaturation, secondary and tertiary structure of proteins are destroyed.

• A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
• B. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
• C. (A) is correct but (R) is not correct
• D. (A) is not correct but (R) is correct

Hint:

Denaturation destroys secondary and tertiary structures, but it does not explain why proteins are made of alpha amino acids.

Answer 1

The Correct Option is B

Concept:
Proteins are polymers of amino acids joined by peptide bonds. Most protein amino acids are alpha amino acids.

Step 1: Check Assertion (A).
Proteins are made up of alpha amino acids. \[ A \text{ is correct} \]

Step 2: Check Reason (R).
During denaturation, the secondary and tertiary structures are destroyed, but the primary structure generally remains intact. \[ R \text{ is correct} \]

Step 3: Check explanation.
The reason talks about denaturation, while the assertion talks about the basic building blocks of proteins. Therefore, Reason does not explain Assertion. \[ \therefore \text{Correct Answer is (B)} \]