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Q. No.During secondary treatment of sewage water:
I:
vigorous growth of useful aerobic microbes into flocs is allowed
II:
aerobic microbes consume the major part of the organic matter in the effluent.
III:
the BOD of the water sample gets significantly increased
1.
Only I and II are correct
2.
Only I is correct
3.
Only II and III are correct
4.
I, II and III are correct
Subtopic: Microbes in Sewage Treatment |
70%
From NCERT
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Consider the given statements regarding antibiotics:
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
| I: | An antibiotic is a type of antimicrobial substance active against bacteria. |
| II: | Antibiotics may either kill or inhibit the growth of bacteria. |
| III: | Antibiotics are highly effective against viruses such as the common cold or influenza. |
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Industrial Products, Beverages & Antibiotics |
73%
From NCERT
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NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital
When lactic acid bacteria (LAB) is used for converting milk to curd, it improves the nutritional quality of curd by increasing:
1. Iron content of the curd
2. Vitamin B12 content of the curd
3. Vitamin D content of the curd
4. Protein content of the curd
1. Iron content of the curd
2. Vitamin B12 content of the curd
3. Vitamin D content of the curd
4. Protein content of the curd
Subtopic: Microbes in Household Products |
94%
From NCERT
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‘Toddy’, a traditional drink in some parts of southern India, is made by fermenting sap from:
| 1. | Palms | 2. | Soybean |
| 3. | Potato | 4. | Barley |
Subtopic: Microbes in Household Products |
93%
From NCERT
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Consider the given tow statements:
| Statement I: | BOD is a measure of the organic matter present in the water. |
| Statement II: | BOD refers to the amount of the oxygen that would be consumed if all the organic matter in one litre of water were oxidised by bacteria. |
| 1. | Statement I is correct; Statement II is incorrect |
| 2. | Statement I is incorrect; Statement II is incorrect |
| 3. | Statement I is correct; Statement II is correct |
| 4. | Statement I is incorrect; Statement II is correct |
Subtopic: Microbes in Sewage Treatment |
87%
From NCERT
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Consider the two statements:
| Assertion (A): | The use of baculovirus as biocontrol agents is especially desirable when an ecologically sensitive area is being treated. |
| Reason (R): | Baculoviruses are species-specific, narrow spectrum insecticides. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is True; (R) is False |
| 3. | (A) is False; (R) is False |
| 4. | Both (A) and (R) are True but (R) does not correctly explain (A) |
Subtopic: Microbes in Biocontrol Agent |
89%
From NCERT
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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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Which of the following cheese is ripened with the help of a fungus?
1. Swiss cheese
2. Roquefort cheese
3. Cottage cheese
4. Cream cheese
1. Swiss cheese
2. Roquefort cheese
3. Cottage cheese
4. Cream cheese
Subtopic: Microbes in Household Products |
90%
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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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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