21. Identify the following antibiotics with their modes of action.
Group I (Antibiotic)
Group II (Mode of action)
P. Ampicillin
1. Inhibition of protein synthesis
Q. Tetracycline
2. Inhibition of cell wall synthesis
R. Nystatin
3. Damage to cytoplasmic membrane
S. Anthramycin
4. Damage to DNA structure
| Group I (Antibiotic) | Group II (Mode of action) |
| P. Ampicillin | 1. Inhibition of protein synthesis |
| Q. Tetracycline | 2. Inhibition of cell wall synthesis |
| R. Nystatin | 3. Damage to cytoplasmic membrane |
| S. Anthramycin | 4. Damage to DNA structure |
22. Match the products in Group I with the microbial cultures in Group II used with 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
| 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 |
23. A biological process is involved in the . . . . . . . . treatment of industrial effluent.
24. Which one of the following bioreactor configurations is the basis for a trickling biological filter?
25. Ethanol concentration is lowest in
26. The selection of the appropriate purification method in the product recovery after microbial fermentation depends on the
27. Match items in Group I with correct examples from those in Group II.
Group I
Group II
P. Catabolic product
1. Griseofulvin
Q. Bioconversion
2. Baker's yeast
R. Biosynthetic product
3. 6-Aminopenicillanic acid
S. Cell mass
4. Ethanol
| Group I | Group II |
| P. Catabolic product | 1. Griseofulvin |
| Q. Bioconversion | 2. Baker's yeast |
| R. Biosynthetic product | 3. 6-Aminopenicillanic acid |
| S. Cell mass | 4. Ethanol |
28. Match the items in Group I with the terms given in Group II.
Group I
Group II
P. Lactobacillus and Bifidobacteria
1. Prebiotics
Q. Polychlorobenzenes (PCBs)
2. Probiotics
R. Fructo-oligosaccharides
3. Antibiotics
S. β-Lactams
4. Xenobiotics
| Group I | Group II |
| P. Lactobacillus and Bifidobacteria | 1. Prebiotics |
| Q. Polychlorobenzenes (PCBs) | 2. Probiotics |
| R. Fructo-oligosaccharides | 3. Antibiotics |
| S. β-Lactams | 4. Xenobiotics |