Select Question Set:
Q. No.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
Please attempt this question first.
Hints
Please attempt this question first.
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
Please attempt this question first.
Hints
Please attempt this question first.
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
Please attempt this question first.
Hints
Please attempt this question first.
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
Please attempt this question first.
Hints
Please attempt this question first.
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
Please attempt this question first.
Hints
Please attempt this question first.
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
Please attempt this question first.
Hints
Please attempt this question first.
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
Please attempt this question first.
Hints
Please attempt this question first.
All the following will be true for Trichoderma spp. except:
| 1. | It is being developed as a biological control agent. |
| 2. | It is a fungicide. |
| 3. | It lives in symbiosis with roots of vascular plants. |
| 4. | It is very common in the root ecosystems. |
Subtopic: Microbes in Biocontrol Agent |
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Consider the given two statements:
| Assertion (A): | The use of pathogens like baculoviruses as biocontrol agent in ecologically sensitive areas should be avoided. |
| Reason (R): | Baculoviruses are broad spectrum general 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 |
68%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Identify the incorrect statement:
| 1. | The use of the chemical fertilisers has contributed significantly to this pollution. |
| 2. | Biofertilisers are organisms that enrich the nutrient quality of the soil. |
| 3. | The main sources of biofertilisers are bacteria, fungi and cyanobacteria. |
| 4. | Chemical fertilizers are integral and essential component of organic farming. |
Subtopic: Microbes as Biofertilizer |
90%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Select Question Set:
© 2025 GoodEd Technologies Pvt. Ltd.