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NEET UG BIOLOGY MCQ: BIOTECHNOLOGY AND ITS APPLICATIONS
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Given below are two statements:
Statement I: Bt toxins are insect group specific and coded by a gene cry IAc.
Statement II: Bt toxin exists as inactive protoxin in B. thuringiensis. However, after ingestion by the insect
the inactive protoxin gets converted into active form due to acidic pH of the insect gut.
In the light of the above statements, choose the correct answer from the options given below:
Statement I: Bt toxins are insect group specific and coded by a gene cry IAc.
Statement II: Bt toxin exists as inactive protoxin in B. thuringiensis. However, after ingestion by the insect
the inactive protoxin gets converted into active form due to acidic pH of the insect gut.
In the light of the above statements, choose the correct answer from the options given below:
View answer and explanation
Correct option: B
Statement I is true but Statement II is false
Option B is correct because Statement I is true, stating Bt toxins are insect group specific and coded by cry IAc, while Statement II is false, as the protoxin activation occurs due to alkaline pH, not acidic.
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