Bt toxin genes have been expressed in plants | vedclass

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(A) $Bt$ toxin is produced by the bacterium $Bacillus$ $thuringiensis$.Specific $Bt$ toxin genes (e.g.,$cryIAc$ and $cryIIAb$) have been incorporated

Vedclass · Accepted Answer

$I$ and $II$ only

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(A) $Bt$ toxin is produced by the bacterium $Bacillus$ $thuringiensis$.Specific $Bt$ toxin genes (e.g.,$cryIAc$ and $cryIIAb$) have been incorporated into crop plants to provide resistance against specific insect pests.$I.$ Tobacco budworm and armyworm are Lepidopterans,which are susceptible to $Bt$ toxins.$II.$ Beetles are Coleopterans,which are also susceptible to specific $Bt$ toxins.$III.$ Flies and mosquitoes are Dipterans. While $Bt$ toxins are used for mosquito control in water bodies,they are not typically the primary targets for $Bt$ transgenic crops in the context of agricultural resistance mentioned in standard textbooks.Therefore,$Bt$ crops are primarily engineered for resistance against Lepidopterans and Coleopterans.Thus,the correct option is $I$ and $II$ only.

$Bt$ toxin genes have been expressed in plants to provide resistance against:
$I.$ Tobacco budworm and armyworm
$II.$ Beetles
$III.$ Flies and mosquitoes
Choose the correct option.

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$Bt$ toxin genes have been expressed in plants to provide resistance against:$I.$ Tobacco budworm and armyworm$II.$ Beetles$III.$ Flies and mosquitoesChoose the correct option.