Q.31 Match the chemicals in Group I with the possible type/class in Group II
| Group I | Group II |
|---|---|
| P. Picloram | 1. Vitamin |
| Q. Zeatin | 2. Auxin |
| R. Thiamine | 3. Amino Acid |
| S. Glutamine | 4. Cytokinin |
Options:
(A) P-2, Q-4, R-1, S-3
(B) P-4, Q-1, R-2, S-3
(C) P-3, Q-1, R-2, S-4
(D) P-4, Q-2, R-1, S-3
Picloram Zeatin Thiamine Glutamine Matching: Correct Answer Explained
Discover the correct matching of Picloram, Zeatin, Thiamine, and Glutamine with their plant hormone and biochemical classes for NEET biology exam prep.
Picloram acts as a synthetic auxin in plant growth regulation. Zeatin functions as a natural cytokinin promoting cell division.
Chemical Classifications
Picloram (P) belongs to the auxin class (2), a synthetic herbicide mimicking natural auxins like IAA to control weeds by disrupting growth.
Zeatin (Q) is a cytokinin (4), the first naturally occurring cytokinin isolated from corn, essential for cell division and shoot formation.
Thiamine (R) serves as vitamin B1 (1), vital for carbohydrate metabolism and often used in plant tissue culture as a growth factor.
Glutamine (S) qualifies as an amino acid (3), a key nitrogen donor in biosynthesis pathways for nucleic acids and proteins in plants.
Correct Answer
The matching is P-2, Q-4, R-1, S-3, corresponding to Option (A). This aligns with standard plant physiology classifications where Picloram is an auxin herbicide, Zeatin a cytokinin, Thiamine a vitamin, and Glutamine an amino acid.
Options Analysis
| Option | P (Picloram) | Q (Zeatin) | R (Thiamine) | S (Glutamine) | Status |
|---|---|---|---|---|---|
| (A) | 2 (Auxin) | 4 (Cytokinin) | 1 (Vitamin) | 3 (Amino Acid) | ✅ Correct |
| (B) | 4 (Cytokinin) | 1 (Vitamin) | 2 (Auxin) | 3 (Amino Acid) | ❌ Wrong; swaps Picloram and Zeatin roles |
| (C) | 3 (Amino Acid) | 1 (Vitamin) | 2 (Auxin) | 4 (Cytokinin) | ❌ Wrong; misclassifies all except possibly Glutamine |
| (D) | 4 (Cytokinin) | 2 (Auxin) | 1 (Vitamin) | 3 (Amino Acid) | ❌ Wrong; confuses Picloram with cytokinin |
Option (A) precisely matches each chemical’s biological role in plant growth and metabolism.
