Q. No.Which of the following alcoholic drinks are produced without distillation?
1.
Whiskey and Brandy
2.
Brandy and Rum
3.
Wine and Beer
4.
Wine and Brandy
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| Statement I. | Rhizobium forms symbiotic associations and forms nodules on the roots of non-leguminous plants. |
| Statement II. | Azotobacter and Azospirillum can fix atmospheric nitrogen only as symbionts. |
| Statement III. | Anabaena, Nostoc and Oscillatoria are autotrophic microbes capable of fixing atmospheric nitrogen. |
1. Only Statement I and Statement II.
2. Only Statement III.
3. Only Statement I.
4. Statement I, Statement II and Statement III.
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| I. | The bacteria Bacillus thuringiensis is an example of a microbial biocontrol agent that can be introduced in order to control butterfly caterpillars. |
| II. | The bacteria are available in sachets as dried spores which are mixed with water and sprayed onto vulnerable plants such as brassicas and fruit trees, where these are eaten by the insect larvae. |
| III. | In the gut of the larvae, the toxin is released and the larvae get killed. |
| IV. | The bacterial disease will kill the caterpillars, but leave other insects unharmed. |
| V. | Because of the inadequate development of methods of genetic engineering, scientists have not been able to introduce B. thuringiensis toxin genes into plants. |
| 1. | 2 | 2. | 3 |
| 3. | 4 | 4. | 5 |
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| 1. | It basically involves the physical removal of particles – large and small. |
| 2. | Floating debris is removed by sequential filtration. |
| 3. | Grit [soli and small pebbles] are removed by sedimentation. |
| 4. | All solids that settle form the activated sludge. |
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A therapeutic product that is used to prevent the risk of coronary artery disease by its effect on one of the risk factors is obtained from the microbe:
| 1. | Trichoderma polysporum | 2. | Streptococcus pyogenes |
| 3. | Pseudomonas putida | 4. | Monascus purpureus |
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Fleming first observed the antibiotic properties of the mould that makes penicillin. But the credit to develop it into a useful treatment goes to:
| 1. | Selman Waksman | 2. | Florey and Chain |
| 3. | Beadle and Tatum | 4. | Zinder and Lederberg |
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The primary objective of the secondary treatment of sewage water is:
| 1. | the removal of coarse solids and other large materials often found in raw wastewater. |
| 2. | the removal of settleable organic and inorganic solids by sedimentation, and the removal of materials that will float by skimming. |
| 3. | production of biogas that can be used as an efficient fuel, especially in rural households. |
| 4. | the removal of biodegradable dissolved and colloidal organic matter using aerobic biological treatment processes. |
Baculoviruses are excellent candidates for:
| 1. | Species-specific, narrow-spectrum insecticidal applications |
| 2. | Species-specific, broad-spectrum insecticidal applications |
| 3. | Biocontrol of fungal diseases |
| 4. | Biocontrol of aphids and mosquitoes |
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In the anaerobic sludge digesters during sewage water treatment:
| 1. | The primary sludge is treated with aerobic microbes and activated sludge is created |
| 2. | The primary sludge is treated with anaerobic microbes and activated sludge is created |
| 3. | The activated sludge is digested by anaerobic microbes producing biogas during the process |
| 4. | The activated sludge is digested by aerobic microbes producing biogas during the process |
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Consider the given two statements:
| I: | BOD is an indirect measure of the organic matter present in the water. |
| II: | The BOD test measures the rate of uptake of oxygen by microorganisms in a sample of water. |
| 1. | Both I and II are correct and II explains I. |
| 2. | Both I and II are correct but II does not explain I. |
| 3. | Only II is correct. |
| 4. | Both I and II are incorrect. |
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