Question

Plasmids are extrachromosomal circular $DNA$ molecules

• A. which have their own point of replication and can replicate independently
• B. which have their own point of replication but cannot replicate independently
• C. which neither have their own point of replication and nor can replicate independently
• D. none of the above

Answer 1

Answer: (A)

Plasmids are extrachromosomal genetic element found in many bacteria and in a few eukaryotic cells. Plasmids are closed circles of double stranded $DNA$ that can exist and replicate independently of the chromosome Plasmids provide genetic instructionsffor certain cell activities (e.g. resistance to antibiotic drugs). Plasmids are-Widely used as vectors to produce recombinant $DNA$ for gene cloning.