Question

Match List-I with List-II
List-I (Amino acid) vs List-II (Their symbol)
(A) Glycine - (I) M
(B) Glutamine - (II) G
(C) Tryptophan - (III) Q
(D) Methionine - (IV) W
Choose the correct answer from the options given below:

• (A) - (I), (B) - (II), (C) - (III), (D) - (IV)
• (A) - (II), (B) - (III), (C) - (IV), (D) - (I)
• (A) - (III), (B) - (IV), (C) - (I), (D) - (II)
• (A) - (IV), (B) - (I), (C) - (II), (D) - (III)

Hint:

To remember tricky single-letter codes:
Glutamine = Q (Q-tamine)
Asparagine = N (asparagi-N-e)
Tryptophan = W (double ring looks like W)
Lysine = K (comes before L)

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
This matching question requires associating the standard twenty amino acids with their universally recognized single-letter IUPAC abbreviations.
Detailed Explanation:
Let us match the amino acids from List-I with their single-letter symbols in List-II:
- (A) Glycine: The simplest amino acid, represented by the single-letter symbol G.
This matches with (II).
- (B) Glutamine: To distinguish it from Glutamic acid (E), Glutamine is designated by the single-letter symbol Q (phonetically thought of as "Q-tamine").
This matches with (III).
- (C) Tryptophan: Due to its double-ringed indole structure, it is designated by the single-letter symbol W (phonetically "double-U" double ring).
This matches with (IV).
- (D) Methionine: This sulfur-containing amino acid is represented by the single-letter symbol M.
This matches with (I).
Thus, the correct matching sequence is: (A) - (II), (B) - (III), (C) - (IV), (D) - (I).

Step 2: Final Answer:
The matching sequence corresponds to option (B).