Question

the unpaired nucleotides produced by the action of restriction enzymes are referred to as
sticky ends
base sequences
single strands
restriction fragments
ligases

Explanation:

Restriction enzymes cut DNA at specific recognition sites. When they cut the DNA, they can produce overhanging ends called sticky ends. These are short single - stranded sequences that can base - pair with complementary sequences. Ligases are enzymes that join DNA fragments. Restriction fragments are the DNA pieces produced by restriction enzymes, but the unpaired nucleotides specifically refer to the overhanging parts. Single strands would be a more general term for a single - stranded DNA molecule, not specifically the unpaired nucleotides from restriction enzyme action. Base sequences are just the order of nucleotides in a DNA strand.

Answer:

sticky ends