The Ends of DNA Molecules Cut by Restriction Enzymes Are

question 18

Multiple Choice

The ends of DNA molecules cut by restriction enzymes are "sticky" because

• A) the enzymes coat them with protective, complex polysaccharides.
• B) unless a second enzyme is added, the fragments stick to the restriction enzymes.
• C) they are single-stranded.
• D) the enzymes cut each strand of the DNA at different places.
• E) they are single-stranded and the enzymes cut each strand of the DNA at different places.

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