AIIMS2018Chemistry-Biomolecules

AIIMS 2018 Chemistry Proteins Assertion Reason Question

Type: Assertion Reason-conceptual-Medium-Class 12

Proteins are made up of α-aminoacids. During this formation, NH₂ group of one amino acid condenses with COOH of the other with elimination of a water molecule to form a peptide bond.

A

Both assertion and reason are correct and reason is the correct explanation of the assertion.

B

Both assertion and reason are correct but reason is not the correct explanation of the assertion.

C

Assertion is correct but reason is incorrect.

D

Assertion is incorrect but reason is correct.

Correct Answer

Option C

Detailed Explanation

Option C is correct because the assertion accurately states that proteins are formed from α-amino acids through the condensation of the NH₂ group of one amino acid with the COOH group of another, resulting in a peptide bond. However, the reason provided is incorrect as it does not specify that the elimination of a water molecule (H₂O) occurs during this process; instead, it merely describes the formation of the bond without detailing the reaction mechanism.

Option A is incorrect because, while the assertion is true, the reason does not correctly explain it. Option B is incorrect for the same reason; although both statements are true, the reason fails to adequately explain the assertion. Option D is incorrect because the assertion is indeed correct, making it impossible for the reason to be the only correct statement.

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