21. Which of the following gene is transferred to plants that detoxify the herbicide atrazine?

A. Nitrilase
B. Glutathione S-transferase (GST)
C. Phosphinothrium acetyltransferase
D. All of these

22. Which of the following self-pollinating plant/(s) tend to be homozygous?

A. Peas
B. Tomato
C. Peach
D. All of these

23. Which cell-based plant technology involves the combining of two cells without cell walls from different species?

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

24. A naturally occurring variant, possessing characteristics of interest, is identified. This plant is selectively bred. This is an example of

A. traditional plant breeding
B. transgenic technology
C. mutant selection
D. none of these

25. Which of the following dies from Ti plasmid infection?

A. Rice
B. Corn
C. Sorghum
D. All of these