Q.29 Match the products in Group I with their respective organisms in Group II.
| Group I | Group II |
|---|---|
| P. Glycerol Q. Glutamic acid R. Curdlan S. Amphotericin B | 1. Corynebacterium glutamicum 2. Alcaligenes faecalis 3. Dunaliella salina 4. Streptomyces nodosus |
(A) P-2, Q-1, R-3, S-4
(B) P-4, Q-2, R-1, S-3
(C) P-3, Q-1, R-2, S-4
(D) P-2, Q-1, R-4, S-3
Introduction
Questions based on industrial microbiology and biotechnology are frequently asked in NEET, CSIR-NET, GATE, and other competitive exams. One such important concept is matching biochemical products with their respective producing organisms.
This article explains the given match-the-following question in a clear, step-by-step manner, ensuring conceptual clarity and exam readiness.
Concept-Wise Explanation
P. Glycerol → Dunaliella salina (3)
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Dunaliella salina is a halophilic microalga.
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It produces large amounts of glycerol as an osmoprotectant to survive in high-salt environments.
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This glycerol has commercial importance.
✔ Correct match: P-3
Q. Glutamic Acid → Corynebacterium glutamicum (1)
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Corynebacterium glutamicum is industrially famous for producing L-glutamic acid.
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Glutamic acid is widely used in the food industry (MSG production).
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This is a classic and frequently asked fact.
✔ Correct match: Q-1
R. Curdlan → Alcaligenes faecalis (2)
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Curdlan is a β-1,3-glucan polysaccharide.
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It is produced by Alcaligenes faecalis.
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Curdlan is used as a food additive and gelling agent.
✔ Correct match: R-2
S. Amphotericin B → Streptomyces nodosus (4)
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Amphotericin B is a polyene antifungal antibiotic.
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It is produced by Streptomyces nodosus.
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Used in treatment of systemic fungal infections.
✔ Correct match: S-4
Correct Combination
Combining all correct matches:
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P → 3
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Q → 1
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R → 2
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S → 4
Final Answer
✅ Correct Option: (C)
P-3, Q-1, R-2, S-4
Why Other Options Are Incorrect
Option (A)
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Incorrectly matches glycerol with Alcaligenes faecalis.
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Glycerol is primarily associated with Dunaliella salina.
Option (B)
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Amphotericin B is wrongly matched with Dunaliella salina.
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Amphotericin B is an antibiotic, not an algal product.
Option (D)
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Curdlan is incorrectly matched with Streptomyces nodosus.
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Streptomyces nodosus produces antibiotics, not polysaccharides.
Exam Tip
Memory Trick:
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Glutamic acid → “glutamicum”
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Amphotericin → “Streptomyces”
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Glycerol → “salina (salt stress)”
Conclusion
Understanding the biological sources of industrial products is essential for mastering biotechnology MCQs. By linking each product with its correct microorganism, you can confidently tackle similar questions in competitive exams.
Correct Answer: Option (C)
