A restriction enzyme cuts a 25,700 bp segment of DNA into three fragments.Fragment A is 5,800 bp and fragment B is 6,600 bp.How long is fragment C,and which of the fragments will move the farthest in an electrophoresis gel?
A) 12,400 bp;fragment A
B) 12,400 bp;fragment C
C) 13,300 bp;fragment A
D) 13,300 bp;fragment C
E) 19,900 bp;fragment C

Question

Quizplus · Accepted Answer

Fragment C is 13,300 bp (25,700 - 5,800 - 6,600). In electrophoresis, smaller fragments move farther, so fragment A (5,800 bp) will move the farthest.

A Restriction Enzyme Cuts a 25,700 Bp Segment of DNA