Question

Given below are two statements: 
Statement I: Arginine and Tryptophan are essential amino acids. 
Statement II: Glycine does not have any chiral carbon. 
In the light of the above statements, which is the correct option?

• A. Both statement-I and statement-II are correct
• B. Both statement-I and statement-II are incorrect
• C. Statement-I is correct and statement-II is incorrect
• D. Statement-I is incorrect and statement-II is correct

Hint:

Important facts about amino acids: \begin{itemize} \item Glycine is the only amino acid without a chiral carbon \item Essential amino acids must be obtained from diet \item Arginine is conditionally essential \end{itemize}

Answer 1

The Correct Option is D

Statement I: Incorrect. Tryptophan is an essential amino acid, but arginine is a conditionally essential (semi-essential) amino acid, not strictly essential. Statement II: Correct. Glycine has two hydrogen atoms attached to the \( \alpha \)-carbon, hence it does not possess a chiral (asymmetric) carbon atom.