Question

The protein products of the subsequent Bt toxin genes cry I Ac and cry II Ab are liable for controlling
(A)Bollworm
(B)Roundworm
(C)Moth
(D)Fruit fly

Answer 1

The toxin produced by Bacillus thuringiensis (Bt) has been used as an insecticide spray since the 1920s and is usually utilized in organic farming. Bt is additionally the source of the genes won't to genetically modify several food crops so that they produce the toxin on their own to discourage various insect pests.

Complete answer:Bacillus thuringiensis could also be a gram-positive, soil-dwelling bacterium, normally used as a biological pesticide. B. thuringiensis also arises naturally within the stomach of caterpillars of numerous kinds of moths and butterflies, also on leaf surfaces, oceanic environments, animal feces, insect-rich environments, and flour mills and grain warehouse facilities.
Upon sporulation, B. thuringiensis patterns crystals of proteinaceous insecticidal delta-endotoxins (called crystal proteins or Cry proteins), which are encoded by cry genes. In maximum strains of B. thuringiensis , the cry genes are located on a plasmid cry isn't a chromosomal gene in most strains.
Cry toxins have specific activities against insect variety of the orders Lepidoptera, flies and mosquitoes, Coleoptera (beetles), and Hymenoptera (wasps, bees, ants, and sawflies), also as against nematodes. B. thuringiensis is a significant reservoir of Cry toxins for the generation of biological insecticides and insect-resistant genetically modified crops.
Thus the correct answer is Option A - Bollworm

Note: Bt crops are crops that are genetically modified to supply the Bt toxin within the plant. Bt toxin is of course produced in B. thuringiensis. It helps to guard the crop against pests. It acts as natural insecticides. It doesn't have any side effects like chemical pesticides. Bt-crops are insect-resistant plants. It doesn't kill beneficial insects and pollinators. it's harmless to humans and animals.