Special Proteins and Crop Improvement problems
- 1. Which of the following have been used for cryo-preservation of germplasm with 90% tissue survival and 10%plant regeneration that are used in international exchange of germplasm?
Options- A. Meristem tip cultures
- B. Embryo cultures
- C. Both (a) and (b)
- D. Embryo cultures supplemented with GA3 and coconut milk Discuss
Correct Answer: Meristem tip cultures
- 2. Cytoplast (somatic cell hybridization) is the process in which
Options- A. two protoplast along with their nuclei fuse
- B. a normal protoplast along with an enucleated protoplast fuse
- C. both (a) and (b)
- D. two enucleated protoplasts fuse Discuss
Correct Answer: both (a) and (b)
- 3. Which of the following govern sporophytic self-incompatibility in Brassica?
Options- A. Aegilops
- B. Triticum
- C. Both (a) and (b)
- D. S alleles Discuss
Correct Answer: S alleles
- 4. Which of the following is the class of hybridization?
Options- A. Intervarietal
- B. Interspecific
- C. Intergeneric
- D. all of these Discuss
Correct Answer: all of these
- 5. The hybrid embryo can be rescued from damage/collapse by growing it
Options- A. at low temperature
- B. at low pH
- C. at low water activity
- D. in artificial medium Discuss
Correct Answer: in artificial medium
- 6. Meristem culture of banana enables
Options- A. rapid multiplication
- B. elimination of bunch top virus disease
- C. both (a) and (b)
- D. slow growth Discuss
Correct Answer: both (a) and (b)
- 7. Which of the following has been confirmed on sugarcane genotypes?
Options- A. Bacilliform virus
- B. Cytomegalovirus
- C. Varicella-zoster virus
- D. Erythrovirus Discuss
Correct Answer: Bacilliform virus
- 8. The tumor phenotype, which can be maintained indefinitely in tissue culture, results from the expression of genes on the
Options- A. T-DNA
- B. c-DNA
- C. r-DNA
- D. m-RNA Discuss
Correct Answer: T-DNA
- 9. MS medium, is found essential for initial morphogenesis of the immature embryos and to enhance callus development, when supplemented with
Options- A. GA3
- B. GA3 and coconut milk
- C. adenine
- D. adenine and kinetin Discuss
Correct Answer: GA3 and coconut milk
- 10. Protoplast fusion technique generally involves
Options- A. isolation only
- B. isolation and fusion
- C. isolation, fusion and culturing
- D. hybridization between two species Discuss
Correct Answer: isolation, fusion and culturing
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