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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
Name and explain the technique used for separating DNA fragments and making them available for biotechnology experiments.
Write a short note on Electrophoresis.
The enzyme nuclease hydrolyses ______ of polynucleotide chain of DNA.
Identify the palindromic sequence which is recognized by the EcoRI restriction enzyme.
From the following which one is NOT a feature of the plasmids?
Identify the process by which bacteria protect their own DNA from the attack of restriction enzymes.
The following identifies the major features of technology that differentiate modem biotechnology from classical biotechnology.
i. Capability of science to change the genetic material for getting new specific products through rDNA technology, polymerase chain reaction (PCR), microarrays, cell culture and fusion, and bioprocessing.
ii. Ownership of technology and its sociopolitical impact.
iii. Modem biotechnology makes use of only fermentation technology.
iv. Classical biotechnology relies only on principles of plant and animal tissue culture.
Name a recombinant vaccine that is currently being used in vaccination programme.
Which of the following enzyme catalyses the removal of nucleotides from the end of DNA molecules?
The manipulation of genetic material towards a desired end using "in-vitro" process is called______.
