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Q. No.
Assertion (A):
While working on Staphylocci, Alexander Fleming observed that Penicillium notatum inhibits the growth of the bacteria.
Reason (R):
This inhibiting chemical was commercially extracted and its full potential was established by Alexander Fleming.
1.
Both (A) and (R) are True and (R) is the correct explanation of (A)
2.
Both (A) and (R) are True and (R) is not the correct explanation of (A)
3.
(A) is True, (R) is false
4.
(A) is false, (R) is True
Subtopic: Microbes in Household Products |
75%
Level 2: 60%+
Hints
| Assertion (A): | Biofertilizers are preferred over chemical fertilizers. |
| Reason (R): | Chemical fertilizers are more hazardous to the environment. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A) |
| 2. | Both (A) and (R) are True and (R) is not the correct explanation of (A) |
| 3. | (A) is True, (R) is False |
| 4. | (A) is False, (R) is True |
Subtopic: Microbes as Biofertilizer |
90%
Level 1: 80%+
Hints
| Assertion (A): | Most of the orchid species seedlings cannot proceed with development in the absence of symbiotic fungi. |
| Reason (R): | Lichens contain symbiotically associated fungi. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A) |
| 2. | Both (A) and (R) are true and (R) is not the correct explanation of (A) |
| 3. | (A) is true, (R) is false |
| 4. | (A) is false, (R) is true |
Subtopic: Microbes in Biocontrol Agent |
54%
Level 3: 35%-60%
Hints
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Assertion: Azolla pinnata is used as biofertilizer in rice cultivation.
Reason: Azolla performs nitrogen fixation with the help of symbiotic bacterium Bacillus.
1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false
Reason: Azolla performs nitrogen fixation with the help of symbiotic bacterium Bacillus.
1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false
Subtopic: Microbes as Biofertilizer |
51%
Level 3: 35%-60%
Hints
Assertion: Yeast such as Saccharomyces cerevisiae are used in baking industry.
Reason: Carbon dioxide produced during fermentation causes bread dough to rise by thermal expansion.
1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false
Reason: Carbon dioxide produced during fermentation causes bread dough to rise by thermal expansion.
1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. Assertion is true but reason is false
4. Both assertion and reason are false
Subtopic: Microbes in Production of Biogas |
Level 3: 35%-60%
Hints
Read the following statements:
Which of the above statements are correct?
1. (i) and (iii)
2. (ii), (iii) and (iv)
3. (ii) and (v)
4. (ii) and (iv)
| (i) | Trichoderma is a symbiotic algae which is common in root ecosystems and effective against several plant pathogens |
| (ii) | Dragonflies are biocontrol agents |
| (iii) | Bacillus thuringiensis spores are mixed in alcohol and sprayed to vulnerable plants like brassicas and fruit trees |
| (iv) | Baculoviruses attack arthropods and other insects |
| (v) | Nucleopolyhedrovirus (NPV) have species-specific, broad spectrum insecticidal applications |
1. (i) and (iii)
2. (ii), (iii) and (iv)
3. (ii) and (v)
4. (ii) and (iv)
Subtopic: Chemicals, Enzymes & Other Bioactive Molecules |
60%
Level 2: 60%+
Hints
Match the columns:
1. A = (ii), B = (iv), C = (i), D = (iii)
2. A = (ii), B = (iv), C = (iii), D = (i)
3. A = (iii), B = (iv), C = (i), D = (ii)
4. A = (i), B = (ii), C = (iv), D = (iii)
| Column-I | Column-II | ||
| 1. | Rotenone | (i) | Chrysanthemum cinerarifolium |
| 2. | Nicotine | (ii) | Derris elliptica |
| 3. | Azadiractin | (iii) | Azadirachta indica |
| 4. | Pyrethrum and cinerin |
(iv) | Nicotiana tabacum |
1. A = (ii), B = (iv), C = (i), D = (iii)
2. A = (ii), B = (iv), C = (iii), D = (i)
3. A = (iii), B = (iv), C = (i), D = (ii)
4. A = (i), B = (ii), C = (iv), D = (iii)
Subtopic: Chemicals, Enzymes & Other Bioactive Molecules |
81%
Level 1: 80%+
Hints
Read the given statements and select the correct option:
| A - | Trichoderma is an effective biocontrol agent of several plant pathogens. |
| B - | B. thuringiensis is effective against larvae of bollworm. |
1. Both A and B are correct
2. Both A and B are incorrect
3. Only A is correct
4. Only B is correct
Subtopic: Microbes in Biocontrol Agent |
78%
Level 2: 60%+
Hints
Match the items in column "A' and coloum 'B' and choose the correct answer
| Column I | Column II |
| A. Lady bird | (i) Methano bacterium |
| B. Mycorrhiza | (ii) Trichoderma |
| C. Biological control | (iii) Aphids |
| D. Biogas | (iv) Glomus |
The correct answer is
| A | B | C | D | |
| (1) | ii | iv | iii | i |
| (2) | iii | iv | ii | i |
| (3) | iv | i | ii | iii |
| (4) | iii | ii | i | iv |
Subtopic: Chemicals, Enzymes & Other Bioactive Molecules | Microbes in Production of Biogas | Microbes in Biocontrol Agent | Microbes as Biofertilizer |
92%
Level 1: 80%+
Hints
Which of the following is wrongly matched in the given table?
|
Microbe |
Product |
Application |
|
|
1. |
Clostridium butylicum |
Lipase |
removal of oil stains |
|
2. |
Trichoderma polysporum |
Cyclosporin A |
immunosuppressive drug |
|
3. |
Monascus purpureus |
Statins |
lowering of blood cholesterol |
|
4. |
Streptococcus |
Streptokinase |
removal of a clot from blood vessel |
Subtopic: Chemicals, Enzymes & Other Bioactive Molecules |
95%
Level 1: 80%+
Hints
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