Question

question 6 of 25
which is a method of making many copies of dna?
a. gel electrophoresis
b. reverse transcriptase
c. nuclear transfer
d. polymerase chain reaction

Explanation:

Polymerase chain reaction (PCR) is a technique used to amplify DNA, making many copies. Gel electrophoresis separates DNA fragments. Reverse transcriptase makes DNA from RNA. Nuclear transfer is for cloning. PCR is specifically for DNA copying.

Answer:

D. Polymerase chain reaction