Q.43 Match the products in Group I with the microbial cultures in Group II used for their industrial production
| Group I | Group II |
|---|---|
| P. Gluconic acid | 1. Leuconostoc mesenteroides |
| Q. L-Lysine | 2. Aspergillus niger |
| R. Dextran | 3. Brevibacterium flavum |
| S. Cellulase | 4. Trichoderma reesei |
Options:
(A) P-2, Q-1, R-3, S-4
(B) P-1, Q-3, R-4, S-2
(C) P-2, Q-3, R-1, S-4
(D) P-3, Q-2, R-4, S-1
Introduction
Industrial microbiology relies heavily on specific microorganisms for the large-scale production of organic acids, amino acids, polysaccharides, and enzymes. “Match the following” questions based on product–microbe relationships are very common in competitive life-science examinations. This article explains the correct matching with clear biological reasoning.
Step-by-Step Matching Explanation
P. Gluconic acid → 2. Aspergillus niger
Gluconic acid is produced industrially by Aspergillus niger through oxidation of glucose using glucose oxidase.
✅ Correct match: P-2
Q. L-Lysine → 3. Brevibacterium flavum
L-lysine is an essential amino acid produced commercially using Brevibacterium flavum via fermentation.
✅ Correct match: Q-3
R. Dextran → 1. Leuconostoc mesenteroides
Dextran is an extracellular polysaccharide synthesized by Leuconostoc mesenteroides from sucrose.
✅ Correct match: R-1
S. Cellulase → 4. Trichoderma reesei
Cellulase enzymes are produced on an industrial scale by Trichoderma reesei, widely used in biofuel and textile industries.
✅ Correct match: S-4
Correct Matching Sequence
P-2, Q-3, R-1, S-4
Correct Answer
✅ Option (C)
Explanation of All Options
Option (A): P-2, Q-1, R-3, S-4
❌ Incorrect
-
L-lysine is not produced by Leuconostoc mesenteroides
-
Dextran is not produced by Brevibacterium flavum
Option (B): P-1, Q-3, R-4, S-2
❌ Incorrect
-
Gluconic acid is not produced by Leuconostoc mesenteroides
-
Cellulase is not produced by Aspergillus niger
Option (C): P-2, Q-3, R-1, S-4
✔ Correct
-
All products are correctly matched with their industrial microbial producers
Option (D): P-3, Q-2, R-4, S-1
❌ Incorrect
-
Multiple mismatches of products and microorganisms
Quick Memory Tricks
-
Gluconic acid → Aspergillus niger (organic acid)
-
L-lysine → Brevibacterium flavum (amino acid)
-
Dextran → Leuconostoc mesenteroides (polysaccharide)
-
Cellulase → Trichoderma reesei (enzyme)
Conclusion
The correct matching of industrial products with their microbial cultures is P-2, Q-3, R-1, S-4, which corresponds to Option (C). Understanding these classic product–microbe relationships is essential for scoring well in industrial microbiology and biotechnology examinations.
