JEE Chemistry 2024 Question with Solution

Given: Two lists are to be matched: biopolymers in List I and their monomers in List II.

Find: The correct matching between the biopolymers and monomers.

From the given solution:

1. Starch is a polysaccharide composed of $\alpha$-glucose molecules, so $A \to II$.
2. Cellulose is made up of $\beta$-glucose monomers, so $B \to III$.
3. Nucleic acid is a polymer of nucleotides, so $C \to I$.
4. Protein is made up of $\alpha$-amino acids, so $D \to IV$.

Therefore, the correct matching is A-II, B-III, C-I, D-IV. Hence, the correct option is D.

The solution also states: The Correct Option is D.

Given: Standard biomolecule-to-monomer relationships.

Find: The correct option by direct recall.

Recall the fundamental matches:

• Starch $\to$ $\alpha$-glucose
• Cellulose $\to$ $\beta$-glucose
• Nucleic acid $\to$ nucleotide
• Protein $\to$ $\alpha$-amino acid

This gives A-II, B-III, C-I, D-IV, which matches option D.

This shortcut works because each biopolymer has a characteristic monomer that is directly memorized in biomolecules.