Q.49 Match the industrial products mentioned in Group I with their producer organisms in
Group II
Group I Group II
P. Citric acid 1. Trichoderma viride
Q. Cellulase 2. Clostridium acetobutylicum
R. Vitamin B12 3. Aspergillus niger
S. Butanol 4. Propionibacterium freudenreichii
(A) P-4, Q-3, R-1, S-2 (B) P-3, Q-1, R-2, S-4
(C) P-2, Q-1, R-4, S-3 (D) P-3, Q-1, R-4, S-2
Citric acid, cellulase, vitamin B12, and butanol represent key industrial products derived from microbial fermentation. The correct matching pairs each product with its primary producer organism from the given options.
Correct Answer
Option (D) P-3, Q-1, R-4, S-2 correctly matches the products: Citric acid with Aspergillus niger (3), cellulase with Trichoderma viride (1), vitamin B12 with Propionibacterium freudenreichii (4), and butanol with Clostridium acetobutylicum (2).
Producer Organisms Explained
Aspergillus niger dominates citric acid production through submerged fermentation, yielding over 1 million tons annually due to its acid-tolerant metabolism. Trichoderma viride excels in cellulase enzyme production, breaking down cellulose for biofuel and textile applications. Propionibacterium freudenreichii synthesizes vitamin B12 via propionic acid fermentation pathways. Clostridium acetobutylicum performs ABE fermentation to produce butanol as a biofuel precursor.
Option Analysis
| Option | Matching | Correctness |
|---|---|---|
| (A) P-4, Q-3, R-1, S-2 | Citric acid-Propionibacterium, Cellulase-A. niger, Vitamin B12-T. viride, Butanol-C. acetobutylicum | Incorrect; mismatches citric acid and cellulase producers. |
| (B) P-3, Q-1, R-2, S-4 | Citric acid-A. niger, Cellulase-T. viride, Vitamin B12-C. acetobutylicum, Butanol-P. freudenreichii | Incorrect; vitamin B12 and butanol swapped. |
| (C) P-2, Q-1, R-4, S-3 | Citric acid-C. acetobutylicum, Cellulase-T. viride, Vitamin B12-P. freudenreichii, Butanol-A. niger | Incorrect; citric acid and butanol misassigned. |
| (D) P-3, Q-1, R-4, S-2 | Citric acid-A. niger, Cellulase-T. viride, Vitamin B12-P. freudenreichii, Butanol-C. acetobutylicum | Correct; aligns with standard industrial microbiology. |
