Question

Match List-I with List-II

List-I (Amino Acid)		List-II (Nature of Amino Acid)
A	Methionine	I	Predominate amino acid in fish
B	Glycine	II	Non-protein amino acid
C	Taurine	III	Simple amino acid
D	Lysine	IV	Sulfur-containing amino acid

Choose the correct answer from the options given below:

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

Hint:

- Glycine is the simplest amino acid ($\text{H}_2\text{N-CH}_2\text{-COOH}$).
- Taurine is a non-protein amino acid that is highly abundant in dark-fleshed fish and is beneficial for cardiovascular health.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Fish muscle tissue contains various amino acids that determine its nutritional value, flavor, and physiological properties.
Detailed Explanation:
Let us match the amino acids in List-I with their biochemical classifications in List-II:
- (A) Methionine: This is an essential amino acid characterized by the presence of a sulfur atom in its side chain. Thus, it is a Sulfur containing amino acid (IV).
- (B) Glycine: This is the simplest possible amino acid, with a single hydrogen atom as its side chain. Thus, it is a Simple amino acid (III).
- (C) Taurine: This is an amino sulfonic acid that is not used in protein synthesis, but is found free in high concentrations in tissues. Thus, it is a Non-protein amino acid (II).
- (D) Lysine: Fish proteins are rich in essential amino acids, with Lysine being the most predominant (I) in fish muscle. This makes fish a valuable dietary source of protein, especially when paired with cereal diets that are deficient in lysine.
This yields the match: (A) - (IV), (B) - (III), (C) - (II), (D) - (I).

Step 2: Final Answer:
The correct matching sequence corresponds to option (1).