16. Transgenic plants

A. contain foreign genes in their cells
B. are used to produce human antibodies
C. both (a) and (b)
D. are plants that differ in geographical locations

17. Low temperatures induce the expression of many cold-induced genes. Transgenic plants with improved cold tolerance have been produced by

A. expressing the protein that activates expression of these genes all the time in plants
B. cooling plants using the Peltier effect
C. expressing a gene for production of antifreeze (ethylene glycol) in plants
D. increasing evaporative cooling from leaf surfaces

18. Nitrilase is encoded by

A. gene bxn in Klebsiella pneumoniae
B. bar gene in Streptomyces spp
C. both (a) and (b)
D. none of these

19. If the goal were to create a plant resistant to an insecticide, which cell-based plant technology would be most effective?

A. Clonal propagation
B. Cybridization
C. Protoplast fusion
D. Mutant selection

20. What are the various disadvantages of cross-protection?

A. Possibility of mutations in inducing mild virus strain
B. Possibility of synergism between inducing virus and other unrelated viruses
C. Possibility of the unnecessary spread of mild virus
D. All of the above