What is the most efficient procedure that scientists can use to obtain more recombinant DNA for a particular trait?

To make many copies of a particular recombinant DNA molecule, scientists place it in a biological vector, such as a plasmid, and let the vector replicate inside a host cell. This process is cloning, so choice C, “clone the recombinant DNA in a biological vector,” is the most efficient procedure. Electrophoresis separates DNA by size, and restriction enzymes cut DNA; neither process produces more copies of the desired DNA.

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