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JEE Main 2025 Jan 29 Shift 2, Chemistry Q4: Proteins

JEE Main2025Jan 29, Shift 2Chemistry
Q.

Identify the essential amino acids from below :

(A) Valine    (B) Proline

(C) Lysine    (D) Threonine

(E) Tyrosine

Choose the correct answer from the options given below :

  1. A

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

  2. B

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

  3. C

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

  4. D

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

Solution

Essential amino acids are those the human body cannot synthesise and must obtain from diet. Standard list includes valine, leucine, isoleucine, lysine, threonine, methionine, phenylalanine, tryptophan and histidine.

From the given set:

Valine, Lysine and Threonine are essential, while Proline and Tyrosine are non-essential (the body synthesises them).

(A), (C) and (D) are essential.

Concept behind this question

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