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Question

The sticky ends of a fragmented DNA molecule are made up of

A
Calcium salts
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B
Endonuclease
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C
Unpaired bases
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D
Methyl groups
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Solution

The correct option is D Unpaired bases
  • The simplest DNA end of a double-stranded molecule is called a 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 at the end of a DNA molecule.
  • These unpaired nucleotides can be in either strand, creating either 3' or 5' overhangs. Longer overhangs are called cohesive ends or sticky ends.

Therefore, the correct answer is option C.

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