Question

Identify the incorrect statements.
(A) Bacillus thuringiensis is a transgenic organism.
(B) Bt toxin enters the testes or the ovaries of the insect pest, sterilizes it, and thus prevents its multiplication.
(C) Proteins encoded by cryIAc and cryIIAb control cotton bollworms.
(D) Bt protein exists as an active toxin in Bacillus.
(E) Alkaline pH of the insect gut solubilizes the toxin protein crystals.
Choose the correct answer from the options given below:

• A. (A), (B), and (D) only
• B. (B) and (D) only
• C. (C) and (D) only
• D. (C), (D), and (E) only

Answer 1

The Correct Option is B

Statements (B) and (D) are incorrect: (B) Bt toxin does not target reproductive organs but affects the insect gut; (D) Bt protein exists as an inactive protoxin, which is activated in the insect's alkaline gut. Bt protein's effectiveness lies in its specific activation in pest guts, not general toxicity.