Gene Transfer in Plants problems
- 1. Which of the following genes are constitutively expressed and control the plant induced activation of other vir genes?
Options- A. vir A and vir G
- B. vir C and vir D
- C. vir B and vir E
- D. vir A and vir B Discuss
Correct Answer: vir A and vir G
- 2. Opine synthesis is the property
Options- A. conferred to plant cells when it transformed by Agrobacterium tumefaciens
- B. determined by the bacteria Agrobacterium tumefaciens
- C. both (a) and (b)
- D. of normal plant cells Discuss
Correct Answer: both (a) and (b)
- 3. In response to the activating signal molecule, an endonuclease is produced that causes nicks in the T-DNA. It is encoded by
Options- A. vir A
- B. vir B
- C. vir C
- D. vir D Discuss
Correct Answer: vir D
- 4. The transfer of intermediate vectors into Agrobacterium are brought about by
Options- A. transformation
- B. biparental mating
- C. triparental mating
- D. transduction Discuss
Correct Answer: triparental mating
- 5. T-DNA transfer and processing into plant genome requires products of which of the following genes?
Options- A. vir A,B
- B. vir G,C
- C. vir D,E
- D. All of these Discuss
Correct Answer: All of these
- 6. Direct DNA uptake by protoplasts can be stimulated by
Options- A. polyethylene glycol (PEG)
- B. decanal
- C. luciferin
- D. all of these Discuss
Correct Answer: polyethylene glycol (PEG)
- 7. Liposomes mediated gene transfer in plants involves
Options- A. plasmid DNA enclosed in a lipid bag
- B. fusion of liposomes with protoplast
- C. use of polyethylene glycol (PEG)
- D. all of the above Discuss
Correct Answer: all of the above
- 8. The left segment of octopine T-DNA (TL) is necessary for
Options- A. enzymes for agropine biosynthesis
- B. tumour formation
- C. conjugative transfer
- D. all of these Discuss
Correct Answer: tumour formation
- 9. Integrated nopaline T-DNA occurs as
Options- A. single segment
- B. two segments
- C. three segments
- D. four segments Discuss
Correct Answer: single segment
- 10. In the liposome mediated gene transfer in plants, nucleic acids are
Options- A. protected from nuclease digestion
- B. stable in liposomes
- C. both (a) and (b)
- D. not stable in liposomes Discuss
Correct Answer: both (a) and (b)
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