16. Microprojectile method of gene transfer in plants involves the delivery of DNA

A. with the help of micromanipulator
B. with the help of biolistics
C. with the help of needles
D. any of the above

17. Which of the following genes are constitutively expressed and control the plant induced activation of other vir genes?

A. vir A and vir G
B. vir C and vir D
C. vir B and vir E
D. vir A and vir B

18. Integrated octopine T DNA occurs as

A. single segment
B. two segments
C. three segments
D. four segments

19. Liposomes mediated gene transfer in plants involves

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

20. Which of the following plant signal molecules regulate the expression of vir B, C, D, and E in case of tobacco?

A. Acetosyringone
B. α-hydroxy syringone
C. Both (a) and (b)
D. None of these