Plasmid is

Options

A. fragment of DNA which acts as vector
B. fragment which joins two genes
C. mRNA which acts as carrier
D. autotrophic fragment

Answer

A

Explanation

(a) A plasmid is piece of DNA, mostly in bacteria (but also in yeast) not forming a part of normal chromosomal DNA of a cell, but capable of replicating independently of it. These often act as vehicles for gene transfer.