Q. No.Plant tissue culture is based on:
1. cellular totipotency 2. indeterminate growth 3. phenotypic plasticity 4. secondary growth
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Consider the given two statements:
| I: | Somatic hybridization and cybridization have great potential for plant improvement. |
| II: | Somatic hybridization through protoplast fusion provides the ability to combine parent genes in higher plants to overcome sexual incompatibility among plant species or genera. |
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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Consider the following two statements:
| I: | In spite of having more than 70 percent of the world's livestock population, the contribution of India and China to the world's farm produce is only 25 percent. |
| II: | The productivity per unit of cattle in these countries is very low. |
1. Both I and II are true and II explains I
2. Both I and II are true but II does not explain I
3. I is true but II is false
4. Both statements are not true
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Identify the incorrect statement regarding Multiple Ovulation Embryo Transfer Technology (MOET):
| 1. | FSH like hormones or PMSG [pregnant mare serum gonadotropin] are used to induce super-ovulation [6 – 8 eggs rather than one per cycle] and Prostaglandins are used to regulate the duration of cycle. |
| 2. | Fresh embryos can be stored at 37ºC for 6 - 8 hours without much harm but it is recommended that the embryos are inserted into the recipient cow or frozen as soon as possible. The embryos can be stored forever in liquid nitrogen. |
| 3. | The animal is either mated with an elite bull or artificially inseminated and the fertilised eggs at 8–32 cell stages are recovered non-surgically and transferred to genetic mothers. |
| 4. | The embryos are transferred to a recipient cow whose oestrous cycle is at the correct receptive stage. |
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Today, all our major food crops are derived from:
1. Wild varieties
2. Domesticated varieties
3. Genetically modified varieties
4. Plant tissue culture
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Cross hybridisation among the selected parents is frequently used for the improvement of crop plants. Which of the following is not a shortcoming of the process?
| 1. | The combination of desired characters may always not be possible |
| 2. | It can be a tedious and time-consuming process |
| 3. | Undesirable characters may get introduced |
| 4. | The number of progeny is very limited |
Better yielding semi-dwarf varieties of rice developed in India are:
1. Sonalika and KalyanSona
2. IR – 8
3. Taichung native – 1
4. Jaya and Ratna
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Resistance to the yellow mosaic virus in bhindi (Abelmoschus Esculentus) was possible by:
| 1. | Conventional hybridization | 2. | Mutations |
| 3. | Genetic engineering | 4. | Tissue culture |
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Breeding crops with higher levels of vitamins and minerals, or higher protein and healthier fats is called:
| 1. | Bioremediation | 2. | Biofortification |
| 3. | Food adulteration | 4. | Biomagnification |
Any part of a plant taken out and grown in a test tube under sterile conditions in special nutrient media for generating new plants is called:
| 1. | Implant | 2. | Explant |
| 3. | Supplant | 4. | Plantlet |
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