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- Question
Which of the following govern sporophytic self-incompatibility in Brassica?
Options- A. Aegilops
- B. Triticum
- C. Both (a) and (b)
- D. S alleles
- Correct Answer
- S alleles
- 1. 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
- 2. 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
- 3. In a plant tumour cell
Options- A. complete Ti plasmid is incorporated in plant nuclear DNA
- B. different parts of the Ti-plasmid are incorporated
- C. only a small specific segment of callus T DNA is incorporated
- D. may vary from plant to plant Discuss
- 4. Which of the following is not true for microinjection technique that involves transfer of DNA into protoplast?
Options- A. It is carried out with the help of micromanipulator
- B. The recipient cells are immobilized on artificial support or artificially bound to substarate
- C. It employs needle with diameter greater than cell diameter
- D. all of the above Discuss
- 5. Which of the following plant signal molecules regulate the expression of vir B, C, D and E in case of tobacco?
Options- A. Acetosyringone
- B. ?-hydroxy syringone
- C. Both (a) and (b)
- D. None of these Discuss
- 6. Which of the following is the class of hybridization?
Options- A. Intervarietal
- B. Interspecific
- C. Intergeneric
- D. all of these Discuss
- 7. 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
- 8. 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
- 9. Which of the following has been confirmed on sugarcane genotypes?
Options- A. Bacilliform virus
- B. Cytomegalovirus
- C. Varicella-zoster virus
- D. Erythrovirus Discuss
- 10. 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
Special Proteins and Crop Improvement problems
Search Results
Correct Answer: both (a) and (b)
Correct Answer: Meristem tip cultures
Correct Answer: only a small specific segment of callus T DNA is incorporated
Correct Answer: It employs needle with diameter greater than cell diameter
Correct Answer: Both (a) and (b)
Correct Answer: all of these
Correct Answer: in artificial medium
Correct Answer: both (a) and (b)
Correct Answer: Bacilliform virus
Correct Answer: T-DNA
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