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.
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Picloram acts as a synthetic auxin in plant growth regulation. Zeatin functions as a natural cytokinin promoting cell division.
Chemical Classifications
Picloram (P)Â 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.​
