OBJECTIVE LIFE SCIENCE
BIOTECHNOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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cry
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iac
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lap
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noy
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Detailed explanation-1: -Bt toxins are insect-group specific. The toxin is coded by a gene named cry. There are a number of them, for example, the proteins encoded by the genes cryIAc and cryIIAb control the cotton bollworms, that of cryIAb controls corn borer.
Detailed explanation-2: -The cry gene family, produced during the late exponential phase of growth in Bacillus thuringiensis, is a large, still-growing family of homologous genes, in which each gene encodes a protein with strong specific activity against only one or a few insect species.
Detailed explanation-3: -The Cry1ac and Cry2ab genes are encoded by an organism known as Bacillus thuringiensis. These genes code for a toxin protein that causes lysis in the gut of the bollworms. The protein acts as a toxin when ingested by the pests. The protein becomes activated after reaching the gut of pests.