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NEET2015ZoologyBiotechnology - Principles and ProcessesActual

Plasmid vector in DNA recombinant technology means

Options

  1. Aa virus that transfers gene to bacteria
  2. Bextra-chromosomal autonomously replicating circular DNA
  3. Csticky end of DNA
  4. Dany fragment of DNA carrying desirable gene.

Correct answer

B. extra-chromosomal autonomously replicating circular DNA

Step-by-step solution

The vectors are DNA molecules that can carry a foreign DNA segment and replicate inside the host cell. Plasmid vectors are extra-chromosomal, self-replicating, usually circular, double-stranded DNA molecules, found naturally in many bacteria and also in some yeast. Although plasmids are usually not essential for normal cell growth and division, they often confer some traits to the host organisms, for example, resistance to certain antibiotics or toxins that can be a selective advantage under certain conditions. The

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