Which one of the following statements best describes the first thing researchers need to do to manipulate DNA?
a. Gel electrophoresis would be used to separate fragments of DNA.
b. Restriction enzymes would be used to cut the DNA into smaller pieces.
c. Single-stranded DNA fragments would be placed with DNA polymerase in a test tube.
d. Researchers would need to separate synthesized strands by size on a gel."
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