Restriction endonucleases are especially useful if they generate "sticky" ends.What makes an end sticky?
A) single-stranded complementary tails
B) blunt ends
C) poly-A sequences
D) 5′ cap
E) interference

Question

Quizplus · Accepted Answer

Sticky ends are created when restriction endonucleases cleave DNA in a staggered fashion, leaving single-stranded overhangs, or tails, that are complementary to each other. These tails can base pair with each other, allowing for easy ligation of two different DNA fragments together.

Restriction Endonucleases Are Especially Useful If They Generate "Sticky" Ends