NEETZoologyBiotechnology and Its Applications
Read the following Assertion and Reason and choose the correct option. Assertion: The Bt toxin protein exist as active protoxins but once an insect ingest the active toxin, it is converted into an inactive form of toxin due to the basic pH of the gut which solubilise the crystals. Reason: The activated toxin binds to the surface of hindgut columnar cells and create pores that cause swelling and lysis and eventually c
Options
- ABoth Assertion and Reason are true and Reason is correct explanation of Assertion
- BBoth Assertion and Reason are true but the Reason is not the correct explanation of Assertion
- CAssertion is true but the Reason is false
- DBoth Assertion and Reason are false
Correct answer
D. Both Assertion and Reason are false
Step-by-step solution
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 crystals. The activated toxin binds to the surface of midgut epithelial cells and create pores that cause swelling and lysis and eventually cause death of the insect.