JEE MAIN - Chemistry (2025 - 29th January Evening Shift - No. 2)

Identify the essential amino acids from below:

(A) Valine

(B) Proline

(D) Threonine

(E) Tyrosine

Choose the correct answer from the options given below:

(A), (C) and (D) only

(C), (D) and (E) only

(A), (C) and (E) only

(B), (C) and (E) only

The nine essential amino acids that must be obtained from the diet are:

Histidine

Isoleucine

Leucine

Lysine

Methionine

Phenylalanine

Threonine

Tryptophan

Valine

From the provided list:

Valine (A) is essential.

Proline (B) is non-essential.

Lysine (C) is essential.

Threonine (D) is essential.

Tyrosine (E) is non-essential (it is considered conditionally essential, but under normal conditions it is non-essential).

Thus, the essential amino acids among those listed are Valine, Lysine, and Threonine.

So the correct answer is:

$$\textbf{Option A: (A), (C) and (D) only}$$