Regarding B.thuringiensis and Bt cotton, correct statements…

Biology Biotechnology and Its Application Statement Based Questions Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 21, 2026

Regarding B.thuringiensis and Bt cotton, correct statements are

Inactive Bt toxin binds the mid gut of the pest due to acidic pH
,

Bt produces cryIAb protein toxin in the Bt cotton plants
and and

Toxin genes of Bt are present in the genome of Bt cotton plants
only

Bt toxin gene has been cloned from the yeast. all of these

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The correct answer is:

The activated Bt 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. The toxin is coded by a gene named cry. The proteins encoded by the gene are cryIAc and cryIIAb which control cotton bollworms.

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