NEET Biology question

*Bacillus thuringiensis* forms protein crystals which contain insecticidal protein. This protein

(A)Binds with epithelial cells of the midgut of the insect pest, ultimately killing itCorrect
(B)Is coded by several genes including the gene *cry*
(C)Is activated by acid pH of the foregut
(D)Does not kill the carrier bacterium, which is itself resistant to this toxin

Answer: (A)

Solution

The correctly and precisely true statement is that the activated *Bt* toxin binds to the epithelial cells of the insect's midgut, creating pores that cause cell swelling, lysis

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Question ID VK-125732