AIPMT MAINS2011Zoology-Biotechnology and its Applications
AIPMT MAINS 2011 Zoology Bt Cotton MCQ Question
Type: MCQ-conceptual-Medium-Class 12
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
Correct Answer
Option C
Detailed Explanation
Bt toxins can bind with the mid gut epithelium of the insect pest and create pores killing it.
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