What happens to DNA (circular DNA or linear DNA that is not free to rotate)when it becomes overwound?
A)It becomes negatively supercoiled.
B)It breaks into a number of fragments.
C)It becomes positively supercoiled.
D)It stretches.
E)Its mass decreases.

Question

Quizplus · Accepted Answer

When DNA becomes overwound, it becomes positively supercoiled. This is because the twisting of DNA causes the double helix to underwind, creating a strain that is relieved by overwinding in the opposite direction. This process is important for DNA compaction and packaging in cells.

What Happens to DNA (Circular DNA or Linear DNA That