Question

Bt toxin for corn borer is coded by which of the cry genes ?

• A. cry I Ac
• B. cry II Ab
• C. cry I Ab
• D. cry II Ac

Answer 1

Answer: (C)

cry I Ab

Bt toxin is a toxin produced by Bacillus thuringiensis, the genes for the toxin have been incorporated in to certain crop plants through genetic engineering. The gene synthesizes the toxins in the plant cells and protects the crop plants from being damaged by insect pest. The genes include cryIAc in Cotton, cryIAb in Corn.

So, the correct answer is 'cryIAb'