Question

Which of the following is not correct statement about the plasmids ?

• A. It is the extrachromosomal DNA in bacteria
• B. It is not an integral part but inert genetic material
• C. Host chromosome can be integrated with the plasmid
• D. Transfer of plasmid can be done from cell to cell without killing the host

Answer 1

Answer: (B)

It is not an integral part but inert genetic material

Answer 2

In addition to the single large circular chromosome, each bacterial cell contains from 1 to 20 much smaller circular duplex DNA molecules which are called as plasmids. Plasmids replicate along with the bacterial chromosome. Their function varies. Some of them become incorporated into the host cell chromosome and are called episomes. These are sometimes transferred from one bacterial cell to another during conjugation.