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NEET
Exam
NEET
Subject
Zoology
Chapter
Biotechnology - Principles and Processes

NEET · Zoology · Biotechnology - Principles and Processes

What is a plasmid?

What is a plasmid?

Options

  1. AA type of bacterium
  2. BA viral particle
  3. CA piece of cut DNA
  4. DAutonomously replicating circular extra-chromosomal DNA

Correct answer

D. Autonomously replicating circular extra-chromosomal DNA

Step-by-step solution

The construction of the first recombinant DNA emerged from the possibility of linking a gene encoding antibiotic resistance with a native plasmid (autonomously replicating circular extra-chromosomal DNA) of Salmonella typhimurium. Stanley Cohen and Herbert Boyer accomplished this in 1972 by isolating the antibiotic resistance gene by cutting out a piece of DNA from a plasmid which was responsible for conferring antibiotic resistance

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