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प्रश्न
One of the major contributions of biotechnology is to develop pest-resistant varieties of cotton plants. Explain how it has been made possible.
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उत्तर
One of the major contributions of biotechnology is the development of insect resistant variety of cotton called Bt cotton. This plant contains the gene (cry gene) from the bacteria Bacillus thuringiensis.
Genes encoded by Cry IAc and Cry II Ab control cotton bollworms and those encoded by Cry IAb control corn borer. The gene from the bacteria is transferred to the plant cell with the help of Agrobacterium Ti-plasmid. The product of this gene is Bt toxin. This toxin is a type of protein that is toxic to a variety of insects including bollworm complex.
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संबंधित प्रश्न
Give the applications of the PCR technique.
Consider there is only one double stranded DNA molecule initially along with all other requirements of PCR. If a PCR machines performs 10 cycles of reaction then bow many double stranded DNA molecules would be present at the end?
Which of the following is not required in the preparation of a recombinant DNA molecule?
What would happen when one grows a recombinant bacterium in a bioreactor but forget to add antibiotic to the medium in which the recombinant is growing?
Which of the following enzyme catalyses the removal of nucleotides from the end of DNA molecules?
What is polymerase chain reaction (PCR)?
Describe three steps involved in mechanism of PCR.
pBR322, used very frequently in cloning experiments as a vector in E. coli is ______.
Explain the mechanism of PCR.
State the steps involved in the process of gene therapy for the treatment of ADA-deficiency.
