Question

when researchers wish to make multiple copies of a gene without first inserting it into a bacterium, they employ

multiple choice

centrifugation

pcr (polymerase chain reaction)

gel electrophoresis

reproductive cloning

Explanation:

PCR (polymerase chain reaction) is a technique used to amplify (make multiple copies of) a specific segment of DNA (including genes) in vitro (outside of a living organism, so no need to insert into bacteria). Centrifugation is used to separate components based on density. Gel electrophoresis separates DNA fragments based on size. Reproductive cloning aims to create a whole organism, not just copy a gene.

Answer:

PCR (polymerase chain reaction)