Small circular molecules of "extra" DNA in bacteria
A) are plasmids.
B) are DNA fragments from their main chromosome.
C) result from the activity of restriction enzymes.
D) are eventually degraded.
E) are none of these.

Question

Quizplus · Accepted Answer

Small circular molecules of "extra" DNA in bacteria are known as plasmids. Plasmids are separate from the main chromosome and can replicate independently. They often carry genes that provide advantages to the bacteria, such as antibiotic resistance or the ability to metabolize unusual substances. Plasmids can also be easily transferred between bacteria through processes like conjugation, making them important factors in the evolution of bacterial populations.

Small Circular Molecules of "Extra" DNA in Bacteria