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Q. No.Biogas is a mixture predominantly of:
1. Methane and Carbon dioxide
2. Methane and Oxygen
3. Carbon dioxide and Oxygen
4. Hydrogen sulphide and Ammonia
1. Methane and Carbon dioxide
2. Methane and Oxygen
3. Carbon dioxide and Oxygen
4. Hydrogen sulphide and Ammonia
Subtopic: Microbes in Production of Biogas |
96%
From NCERT
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The large holes in the cheese shown below is due to fermentation carried out by:
1. Penicillium
2. Propionibacterium
3. Saccharomyces
4. Streptomyces
1. Penicillium
2. Propionibacterium
3. Saccharomyces
4. Streptomyces
Subtopic: Microbes in Household Products |
86%
From NCERT
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In the secondary treatment or biological treatment of sewage water, the primary effluent is passed into large aeration tanks where it is constantly agitated mechanically and the air is pumped into it. This allows:
1. vigorous growth of useful aerobic microbes into flocs
2. the decrease in the number of aerobes in the water
3. rapid increase in the count of methanogens
4. a dramatic decrease in the anaerobic methanogens
Subtopic: Microbes in Sewage Treatment |
91%
From NCERT
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NEET 2025 - Target Batch
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The bottled juices are clarified by the use of:
1. lipases and proteases
2. lysozyme and chitinase
3. DNase and protease
4. Pectinases and proteases
1. lipases and proteases
2. lysozyme and chitinase
3. DNase and protease
4. Pectinases and proteases
Subtopic: Chemicals, Enzymes & Other Bioactive Molecules |
91%
From NCERT
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Mycorrhizal symbiotic fungi in plants commonly belong to the Genus:
1. Glomus
2. Philaphora
3. Byssoclamys
4. Paecilomyces
1. Glomus
2. Philaphora
3. Byssoclamys
4. Paecilomyces
Subtopic: Microbes as Biofertilizer |
97%
From NCERT
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Consider the give statements:
1. Only I and II are correct
2. Only II and III are correct
3. Only I and III are correct
4. I, II and III are correct
| I: | Wine and beer are produced without distillation. |
| II: | Whiskey, brandy and rum are produced by distillation. |
| III: | Toddy is a traditional alcoholic beverage from South India produced by fermenting palm tree sap. |
2. Only II and III are correct
3. Only I and III are correct
4. I, II and III are correct
Subtopic: Industrial Products, Beverages & Antibiotics |
90%
From NCERT
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Match the microbial processes in Column I with their primary benefits or products in Column II.
1. A-3, B-1, C-4, D-2
2. A-1, B-2, C-4, D-3
3. A-2, B-4, C-1, D-3
4. A-4, B-3, C-2, D-1
| Column I | Column II | ||
| A | Anaerobic digestion | 1 | Cleaning up oil spills |
| B | Fermentation by yeast | 2 | Enhancement of soil fertility |
| C | Nitrogen fixation by legume symbionts | 3 | Production of alcoholic beverages |
| D | Bioremediation by Pseudomonas | 4 | Generation of biogas |
1. A-3, B-1, C-4, D-2
2. A-1, B-2, C-4, D-3
3. A-2, B-4, C-1, D-3
4. A-4, B-3, C-2, D-1
Subtopic: Industrial Products, Beverages & Antibiotics | Microbes in Production of Biogas | Microbes as Biofertilizer |
97%
From NCERT
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Penicillin was discovered by:
| 1. | Selman Waksman while working on Staphylococci bacteria |
| 2. | Alexander Fleming while working on Staphylococci bacteria |
| 3. | Albert Schatz while working of Streptomyces |
| 4. | François Henri Hallopeau while working of Streptomyces |
Subtopic: Industrial Products, Beverages & Antibiotics |
98%
From NCERT
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Mycorrhizal symbiotic fungi in plant roots primarily help in:
1. Nitrogen fixation
2. Phosphate absorption
3. Photosynthesis
4. Bicontrol
1. Nitrogen fixation
2. Phosphate absorption
3. Photosynthesis
4. Bicontrol
Subtopic: Microbes as Biofertilizer |
61%
From NCERT
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Consider the given two statements:
| Assertion (A): | Using microbes for the production of industrial products such as enzymes and pharmaceuticals is often more desirable than purely chemical methods. |
| Reason (R): | Microbial production methods can be more environmentally friendly, cost-effective, and can produce substances with higher specificity and lower by-products compared to traditional chemical synthesis. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True and (R) does not correctly explain (A) |
| 3. | (A) is True; (R) is False |
| 4. | (A) is False; (R) is True |
Subtopic: Chemicals, Enzymes & Other Bioactive Molecules |
92%
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