If a restriction endonuclease cuts a linear DNA three times, how many fragments should there be after the DNA is subjected to electrophoresis through an agarose gel?
A) 1
B) 2
C) 3
D) 4
E) 5

Question

Quizplus · Accepted Answer

When a restriction endonuclease cuts a linear DNA molecule three times, it produces four distinct fragments. Each cut divides the DNA into two pieces, so three cuts result in four fragments.

If a Restriction Endonuclease Cuts a Linear DNA Three Times