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What is true for plasmid : -
A
Plasmids are widely used in gene transfer
B
These are found in virus
C
Plasmid contain genes for vital activities
D
These are main part of chromosome
Detailed Solution
Plasmids are small, circular, extra-chromosomal DNA molecules found in bacteria (and some yeasts) that replicate independently.
They carry non-essential genes (e.g. antibiotic resistance), not genes for vital activities, and are not part of the main chromosome. They are not found in viruses.
Because they can carry foreign DNA into host cells and replicate there, plasmids such as pBR322 are widely used as vectors in gene transfer (genetic engineering).
So plasmids are widely used in gene transfer.
They carry non-essential genes (e.g. antibiotic resistance), not genes for vital activities, and are not part of the main chromosome. They are not found in viruses.
Because they can carry foreign DNA into host cells and replicate there, plasmids such as pBR322 are widely used as vectors in gene transfer (genetic engineering).
So plasmids are widely used in gene transfer.