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Q. No.The critical research areas of biotechnology include all the following except:
| 1. | Providing the best catalyst in the form of improved organism usually a microbe or pure enzyme. |
| 2. | Creating optimal conditions through engineering for a catalyst to act. |
| 3. | Downstream processing technologies to purify the protein/organic compound. |
| 4. | Development of new genetically modified microbes that can be used as bio-weapons. |
Subtopic: Intro to Agri Applications | Transgenic Microbes & Animals | Ethical Issues |
81%
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Increased yield of crop during the green revolution was due to:
| I. | Use of improved crop varieties |
| II. | Use of better management practices |
| III. | Use of agrochemicals [fertilisers and pesticides] |
| 1. | Only I | 2. | Only I and III |
| 3. | Only I and II | 4. | I, II and III |
Subtopic: Intro to Agri Applications |
80%
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Consider the two statements:
| Statement I: | Use of genetically modified crops is an important option for increasing food production in the future. |
| Statement II: | Agrochemicals are too expensive for farmers in the developing world. |
| 1. | Statement I is correct and Statement II is incorrect |
| 2. | Both Statement I and Statement II are correct |
| 3. | Both Statement I and Statement II are incorrect |
| 4. | Statement I is incorrect and Statement II is correct |
Subtopic: Intro to Agri Applications |
90%
From NCERT
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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
In the light of the above statements, choose the most appropriate answer from the options given below :
| Assertion (A): | Conventional breeding is not the answer if we want to increase yield in the existing crop varieties. |
| Reason (R): | The existing crop varieties have evolved into new species and traditional hybridisation is not possible now. |
| 1. | Both (A) and (R) are False. |
| 2. | Both (A) and (R) are True but (R) does not explain (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are True and (R) explains (A). |
Subtopic: Intro to Agri Applications |
54%
From NCERT
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The term ‘totipotency’ refers to the capacity of a:
1. cell to generate the whole plant
2. bud to generate the whole plant
3. seed to germinate
4. cell to enlarge in size
Subtopic: Plant Tissue Culture |
93%
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The most important advantage of micropropagation is:
| 1. | production of virus free plants |
| 2. | rapid production of a large number of genetically identical superior plants |
| 3. | creation of somaclonal variations for effective germplasm collection |
| 4. | production of transgenic plants |
Subtopic: Plant Tissue Culture |
63%
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The plantlets produced during plant tissue culture are called somaclones because:
| 1. | They can be produced in a very short span of time |
| 2. | They are the result of the somatic hybridization of two cells |
| 3. | The gametes develop parthenogenetically to produce genetically identical plantlets |
| 4. | They are genetically identical to the original plant from which they were grown |
Subtopic: Plant Tissue Culture |
73%
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Somaclonal variations are:
| 1. | seen in plants that have been produced by plant tissue culture. |
| 2. | due to environmental factors and have no evolutionary advantage. |
| 3. | induced by mutations and are inherited. |
| 4. | not useful in plant breeding programs. |
Subtopic: Plant Tissue Culture |
82%
From NCERT
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In micro-propagation, to obtain virus free plants, the best explants can be:
| 1. | Embryos | 2. | Anther |
| 3. | Meristem | 4. | Primary permanent tissues |
Subtopic: Plant Tissue Culture |
91%
From NCERT
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The first step to achieve somatic hybridization in plants will be:
| 1. | growing individual cells into callus |
| 2. | fusion of two cells in the presence of polyethylene glycol |
| 3. | converting plant cells into protoplast by cellulase |
| 4. | growing plant cells in cytokinin |
Subtopic: Plant Tissue Culture |
59%
From NCERT
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