Read the following statements and choose the correct option…

Physics NEET Full Syllabus Mock Test 180 Question New Syllabus Mock Test - 13 PCB MCQ (Single Correct)

Read the following statements and choose the correct option -
Statement A: Bt toxin gets activated in alkaline pH of insect gut, which solubilizes the protein crystals.
Statement B: Activated toxin binds to the surface of midgut epithelial cells.

Only statement A is correct

Only statement B is correct

Both statements

and

are correct

Both statements A and B are incorrect

Text Solution

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The correct answer is:

Statement A: Correct. Bt toxin is ingested as a protoxin crystal, and the alkaline pH of the insect gut solubilizes and activates it.
Statement B: Correct. The activated toxin binds to specific receptors on the midgut epithelium, creates pores, and causes cell lysis → death of the insect.

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