Kingdom - Monera And Viruses
- fragment of DNA which acts as vector
- fragment which joins two genes
- mRNA which acts as carrier
- autotrophic fragment
Correct Answer: Option(a)
Solution: 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.