Question

The sticky ends of a fragmented DNA molecule are made of

Answer 1

Answer:

The simplest DNA end of a double stranded molecule is called as blunt end. In a blunt-ended molecule both strands terminate in a base pair. Non-blunt ends are created by various overhangs. An overhang is a stretch of unpaired nucleotides in the end of a DNA molecule. These unpaired nucleotides can be in either strand, creating either 3' or 5' overhangs. Longer overhangs are called as cohesive ends or sticky ends. They are most often created by restriction endonucleases when they cut DNA. Very often they cut the two DNA strands four base pairs from each other, creating a four-base 5' overhang in one molecule and a complementary 5' overhang in the other. These ends are called as cohesive since they are easily joined back together by a ligase. So the answer is unpaired bases.

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Answer 2

Answer:

Unpaired bases

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