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In case of Bt cotton, how does the toxic...

In case of Bt cotton, how does the toxic insecticide protein produced by the bacterium kill the insects?

A

Blocking mitochondrial respiration

B

Blocking transfer of nerve impulse

C

Creating pores in body.surfa~e

D

Creating pores in mid-gut epithelial cell

Text Solution

Verified by Experts

The correct Answer is:
D
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Assertion: 'Bť toxin gene has been cloned from bacteria and expressed in plants to provide resistance from insect without the need of insecticides. Reason: 'Bť toxin is produced from bacterium Bacillus thuringiensis.

Why does the Bt toxin not kill the bacterium that produces it but kills the insect that ingests it?

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Select the statements that are incorrect regarding Bt toxin. (1) The toxin is made by the eukaryotic organism (2) The toxin is a protein and insecticidal. (3) they are produced in the active form. (4) The toxin is coded by the cry gene.

Which of the following statements about Bacillus thuringiensis are correct? A. One of the toxin produced by the bacteria is thurioside, which is active against different groups of insect larvae. B. The toxin accumulates inside the bacteria during sporulation. C. Upone ingestion by susceptible insects they are converted into active form and kill them by inhibition of ion transport in the midgut. D. The proteins encoded by the gene Cry II Ab contrls com borer.

How is Bt toxin known to kill the target insects in protection of cotton plants?

AAKASH INSTITUTE ENGLISH-BIOTECHNOLOGY AND ITS APPLICATIONS-ASSIGNMENT (SECTION - A) (OBJECIVE TYPE QUESTIONS)
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