Question

Which one of the following groups of pairs of abbreviation and symbol of amino acids is CORRECT?

• A. Gly=G; Phe=F; Tyr=T
• B. Ala=A; Trp=W; Phe=F
• C. Lys=L; Met=M; Arg=A
• D. His=H; Asn=D; Glu=G

Hint:

Memorable non-intuitive single-letter codes:
- Lysine = K
- Tryptophan = W (Double ring, double-U/W)
- Phenylalanine = F (Fenylalanine)
- Tyrosine = Y (Tyrosine)
- Asparagine = N (Asparagine)
- Glutamic Acid = E (Glutamate)

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Amino acids are designated by standard three-letter abbreviations and single-letter symbols established by the IUPAC-IUB Commission.

Step 2: Detailed Explanation:
Let's evaluate each option to find the fully correct set of pairs:
- Option (A): Gly (Glycine) = G (Correct); Phe (Phenylalanine) = F (Correct); Tyr (Tyrosine) = Y (Incorrect, T is for Threonine).
- Option (B): Ala (Alanine) = A (Correct); Trp (Tryptophan) = W (Correct); Phe (Phenylalanine) = F (Correct). All three pairs in this option are correct.
- Option (C): Lys (Lysine) = K (Incorrect, L is for Leucine); Met (Methionine) = M (Correct); Arg (Arginine) = R (Incorrect, A is for Alanine).
- Option (D): His (Histidine) = H (Correct); Asn (Asparagine) = N (Incorrect, D is for Aspartate); Glu (Glutamic acid) = E (Incorrect, G is for Glycine).

Step 3: Final Answer:
The correct group of pairs is (B).