Question

The toxic protein secreted by Bacillus thuringiensis is..............
A.Tublin
B.insulin
C.Cry protein
D.Allof these

Answer 1

They secrete vegetative insecticidal proteins (Vips) which is a type of cry protein

Answer 2

Correct answer: C). Cry protein

Bacillus thuringiensis is a naturally occurring soil bacteria which produces a crystal protein called as cry protein which act a pesticide to kill insects.

Bt toxin is used for mortality of insects. This cry protein dissolve in the gut of the insect, which have a high pH. Then these toxin invade the gut cell by creating a holes in the lining of gut cells. These protein spills out of gut and cause death of the insect.

Example: Bt Cotton