Suppose one restriction enzyme (enzyme A) makes three cuts in a circular DNA molecule, and another restriction enzyme (enzyme B) makes one cut in that same DNA.The cuts are not in the same place, and the cut fragments are not exactly the same size.The restriction digestion is set up on an electrophoresis gel.How many bands should the gel pick up if only enzyme A is used in the restriction digestion?
A) One
B) Two
C) Three
D) Four
E) Five

Question

Quizplus · Accepted Answer

When enzyme A makes three cuts in a circular DNA molecule, it linearizes the circle with the first cut and then creates two additional fragments with the next two cuts, resulting in a total of four distinct fragments.

Suppose One Restriction Enzyme (Enzyme A) Makes Three Cuts in a Circular