Which of the Following Make(s) Amplification of a DNA Fragment

question 8

Multiple Choice

Which of the following make(s) amplification of a DNA fragment by means of the polymerase chain reaction possible?

• A)Complementary single-stranded nucleic acid sequences can come together to form a duplex molecule.
• B)Duplex nucleic acid molecules can be separated by size by means of electrophoresis.
• C)A restriction enzyme cleaves duplex DNA molecules only at the positions of certain short sequences constituting the enzyme's restrictions site.
• D)DNA polymerase elongates a growing DNA strand by the addition of successive deoxynuclotides to the 3' end.
• E)DNA ligase is an enzyme that can join the ends of single-stranded DNA molecules.

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