Home
Class 12
BIOLOGY
Bacillus thuringiensis forms protein cry...

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

A

Is activated by acid pH of the foregut of the insect pest

B

Does not kill the carrier bacterium which is itself resistant to this toxin

C

Binds with epithelial cells of midgut of the insect pest ultimately killing it

D

Is coded by several genes including the gene cry

Text Solution

Verified by Experts

The correct Answer is:
C
The Bt toxin protein exists inactive toxins but once an insect ingest the protein, it is converted into an active form of toxin due to alkaline pH of the gut which solubilize the crystals. The activate toxin binds to the surface of midgut epithelial cells and create pores that cause cell swelling and lysis an eventually cause death of the insects.
Promotional Banner

Similar Questions

Explore conceptually related problems

Bacillus thuringiensis forms protein crystals which contain insectidical protein. This protein

Bacillus thuringiensis forms crystals which contain insecticidal protein. This protein

Bacillus thuringiensis forms the protein crystals, which contains a toxic insecticidal protein. This proein I. is activated by alkaline pH of the gut of the insect pest. II.binds with the epithelial cells of the midgut of the insect pest ultimately killing it. III.does not kill the carrier bacterium which is itself resistance to this toxin. Which of the statement given above are correct ?

Bacillus thuringiensis produce a protein that kills

A : Bt toxin are protein crystals containing insecticidal protein R : B. thuringiensis forms these protein crystals throughout continuously during their growth period.