Q. No.Why does the bacterium Bacillus thuringiensis not affected by the toxins produced by it that can kill arthropods?
1.
The toxin inactivated by proteins in the bacterial cells.
2.
The bacterial cell does not have organelles and thus it is harmless.
3.
It is produced as a pro-toxin by the bacterium.
4.
The protein needs post-transcriptional modification possible only in eukaryotic cells.
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Identify the incorrect statement regarding the use of RNAi for creating transgenic tobacco plants resistant to Meloidogyne incognita:
| 1. | Agrobacterium tumefaciens was used to transform the plant cells |
| 2. | Double-stranded RNA was introduced into the plant cells |
| 3. | Double-stranded RNA was formed in the plant cells that initiated RNAi |
| 4. | A specific mRNA of the nematode was silenced with the help of dsRNA |
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Gene therapy for ADA deficiency has been tried with the help of which of the following vectors?
| 1. | Microinjection | 2. | Liposome |
| 3. | A bacterium | 4. | A retrovirus |
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Alpha-1-antitrypsin was produced in a transgenic sheep, Tracy. This enzyme is used in the treatment of:
| 1. | Emphysema | 2. | Rheumatoid arthritis |
| 3. | Ovarian cancer | 4. | Pancreatitis |
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Consider the two statements:
| I: | Use of genetically modified crops can be a possible solution for minimizing the use of chemicals and fertilizers that are detrimental for the environment. |
| II: | Genetically modified crops do not require any fertilizers. |
| 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. | I is correct but II is incorrect. |
| 4. | Both I and II are incorrect. |
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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. |
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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 |
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GM crops have been modified with various traits. Golden rice has been developed by the International Rice Research Institute for:
| 1. | Improved shelf life | 2. | Disease resistance |
| 3. | Herbicide resistance | 4. | Improved nutritional value |
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Transgenic animals used to test the safety of polio vaccine are:
| 1. | Mice | 2. | Monkeys |
| 3. | Rabbits | 4. | Pigs |
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A possible permanent cure for SCID can be:
| 1. | Enzyme replacement therapy, in which functional ADA is given to the patient by injections. |
| 2. | Bone marrow transplantation. |
| 3. | A functional ADA cDNA (using a retroviral vector) introduced into lymphocytes. |
| 4. | Gene isolated from marrow cells producing ADA is introduced into cells at early embryonic stages. |
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