(a). Name the insect that attacks cotton crops and causes lot of damag

1.	(a). Name the insect that attacks cotton crops and causes lot of damage to the crop. How has Bt cotton plants overcome this problem and saved the crop? Explain. (b). Write the role of gene cryIAb.
Answer» (a). Cotton bollworm attacks cotton crops and causes lot of damage to the crop. B. thuringiensis forms protein crystals (during a particular phase of their growth). These crystals contain a toxic insecticidal protein. The Bt toxin protein exist as inactive protoxins but once an insect ingest the inactive toxin, it is converted into an active form of toxin due to the alkaline pH of the gut which solubilise the crystal. The activated toxin binds to the surface of midgut epithelial cells and create pores, that cause cell swelling and lysis and eventually cause death of the insect. (b). crylAb controls corn borer

(a). Name the insect that attacks cotton crops and causes lot of damage to the crop. How has Bt cotton plants overcome this problem and saved the crop? Explain. (b). Write the role of gene cryIAb.

Answer»

(a). Cotton bollworm attacks cotton crops and causes lot of damage to the crop.

B. thuringiensis forms protein crystals (during a particular phase of their growth). These crystals contain a toxic insecticidal protein. The Bt toxin protein exist as inactive protoxins but once an insect ingest the inactive toxin, it is converted into an active form of toxin due to the alkaline pH of the gut which solubilise the crystal. The activated toxin binds to the surface of midgut epithelial cells and create pores, that cause cell swelling and lysis and eventually cause death of the insect.

(b). crylAb controls corn borer

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