The gene produces crystals of insecticidal protein which is inactive protoxin, when the bollworm eats the protoxin, the alkaline pH of the gut activates it. Activated protoxin binds to the midgut epithelial cells, creates pores/ causes swelling/ causes lysis / kills the worm.
Name the insect pest that is killed by the products of cry I Ac gene. Explain how the gene makes the plant resistant to the insect pest
Meliodegyne incognita is a nematode and no way related to the gene cry1ac . The answer is cotton bollworms . The description given is correct