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Q. No.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
Subtopic: Chemicals, Enzymes & Other Bioactive Molecules |
91%
From NCERT
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Consider the given two statements:
| Statement I: | The bacterium, Streptococcus, is the source of an enzyme used in patients of myocardial infarction leading to a heart attack. |
| Statement II: | The enzyme is streptokinase, which enhances the action of anti-coagulant heparin. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is incorrect; Statement II is correct |
| 3. | Statement I is correct; Statement II is incorrect |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Chemicals, Enzymes & Other Bioactive Molecules |
From NCERT
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Consider the given two statements:
| Assertion (A): | Cyclosporin A is used as an immunosuppressive agent in organ-transplant patients. |
| Reason (R): | Cyclosporin A is a bioactive molecule produced by the fungus Trichoderma polysporum. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is True; (R) is False |
| 3. | Both (A) and (R) are False |
| 4. | Both (A) and (R) are True but (R) does not correctly explain (A). |
Subtopic: Chemicals, Enzymes & Other Bioactive Molecules |
70%
From NCERT
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Consider the given two statements:
| Assertion (A): | Statins produced by the yeast Monascus purpureus have been commercialised as blood-cholesterol lowering agents. |
| Reason (R): | Statins act by competitively inhibiting the enzyme responsible for the synthesis of cholesterol. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is True; (R) is False |
| 3. | Both (A) and (R) are False |
| 4. | Both (A) and (R) are True but (R) does not correctly explain (A) |
Subtopic: Chemicals, Enzymes & Other Bioactive Molecules |
90%
From NCERT
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All the following statements regarding the primary treatment of sewage water in a STP are true except:
| 1. | Initially, floating debris is removed by sequential filtration. |
| 2. | Then the grit (soil and small pebbles) are removed by sedimentation. |
| 3. | All solids that settle form the primary sludge, and the supernatant forms the effluent. |
| 4. | The effluent from the primary settling tank is discharged in rivers. |
Subtopic: Microbes in Sewage Treatment |
91%
From NCERT
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BOD (biochemical oxygen demand) and DO (dissolved oxygen) are measures of pollution levels in a given water sample. Higher the polluting potential of a water sample:
| 1. | Higher are the values of BOD and DO |
| 2. | Lower are the values of BOD and DO |
| 3. | Higher is the value of BOD and lower is the value of DO |
| 4. | Lower is the value of BOD and higher is the value of DO |
Subtopic: Microbes in Sewage Treatment |
83%
From NCERT
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Regarding ‘activated sludge’ produced during secondary treatment of sewage water:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | A small part of the activated sludge is pumped back into the aeration tank to serve as the inoculum. |
| II: | Major part of the sludge is pumped into large tanks called anaerobic sludge digesters. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Microbes in Sewage Treatment |
92%
From NCERT
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Consider he two statements:
| Statement I: | The ‘conventional’ farming practices often use chemical methods which kill both useful and harmful life forms indiscriminately. |
| Statement II: | The organic farmer works to create a system where the insects that are sometimes called pests are not eradicated, but instead are kept at manageable levels. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is incorrect; Statement II is correct |
| 3. | Statement I is correct; Statement II is incorrect |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Microbes in Biocontrol Agent |
88%
From NCERT
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Consider the given two statements:
| Assertion (A): | An important part of the biological farming approach is to become familiar with the various life forms that inhabit the field, predators as well as pests. |
| Reason (R): | This will help develop appropriate means of biocontrol. |
| 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 |
91%
From NCERT
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Bacillus thuringiensis has been used as:
1. Diazotroph
2. Bioinsecticide
3. Biofertilizer
4. Thrombolytic
1. Diazotroph
2. Bioinsecticide
3. Biofertilizer
4. Thrombolytic
Subtopic: Microbes in Biocontrol Agent |
87%
From NCERT
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