THE MOLECULAR BASIS OF INHERITANCE
RECOMBINANT DNA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a vehicle for the insertion of foreign DNA into bacteria.
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surfaces for respiratory process in bacteria.
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recognition site on recombinant DNA strand.
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enzyme cuts DNA into restriction fragments.
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Detailed explanation-1: -Plasmids have been key to the development of molecular biotechnology. They act as delivery vehicles, or vectors, to introduce foreign DNA into bacteria. Using plasmids for DNA delivery began in the 1970s when DNA from other organisms was first ‘cut and pasted’ into specific sites within the plasmid DNA.
Detailed explanation-2: -Answer and Explanation: Plasmids (or vectors) are important in biotechnology because they are: A. a vehicle for the insertion of recombinant DNA into bacteria.
Detailed explanation-3: -So, the correct option is ‘can be easily isolated and introduced’.
Detailed explanation-4: -Plasmids are important for bacterial evolution and adaptation to the changing environment, as they carry genes which carry beneficial traits for the bacterial cell.
Detailed explanation-5: -Plasmids carrying a specific gene are introduced into bacterial cells, which multiply rapidly and the required DNA fragment is produced in larger quantities. Plasmids are used to prepare recombinant DNA with the desired gene to transfer genes from one organism to another. This is known as genetic engineering.