Circular DNA molecules found in nature (such as bacterial,viral,or mitochondrial DNA)are
A)positively supercoiled.
B)negatively supercoiled.
C)not supercoiled, due to their small size.
D)always oriented in a triple helix to conserve space.
E)always in the relaxed state.

Question

Quizplus · Accepted Answer

Circular DNA molecules found in nature are typically negatively supercoiled. This occurs because the circular molecule must twist upon itself to form a compact structure, resulting in regions of overwinding and underwinding. The negative supercoiling in these molecules can help facilitate DNA replication and gene expression.

Circular DNA Molecules Found in Nature (Such as Bacterial,viral,or Mitochondrial