Practicing Success

Target Exam

CUET

Subject

Biology

Chapter

Biotechnology -Principles and Processes

Question:
What is plasmid vector in DNA recombinant technology ?
Options:
A virus which infect bacteria .
Autonomously replicating circular extra-chromosomal DNA.
Any segment of desirable DNA .
Palindromic nucleotide sequences in the DNA.
Correct Answer:
Autonomously replicating circular extra-chromosomal DNA.
Explanation:
Plasmid is autonomously replicating circular extra-chromosomal DNA.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.