Question

Plasmid is

• A. Small extrachromosomal circular self replicating DNA that can carry genes into host organism
• B. Bacteriophage
• C. DNA found in mitochondria
• D. DNA incorporated in bacterial chromosome

Answer 1

The correct option is A Small extrachromosomal circular self replicating DNA that can carry genes into host organism

Plasmids are small extrachromosomal circular DNA present in bacteria. They are separated from a chromosomal DNA and replicate individually. Very rarely they are present in archaea and eukaryotic organisms as well. They usually carry some genes like antibiotic resistance genes into host organism. These genes provide added advantage to the bacteria.

Thus, the correct answer is 'Small extrachromosomal circular self replicating DNA that can carry genes into host organism.'