Ascientist uses materials in her lab to turn one piece of dna into 100 copies of the same piece what process is the scientist using use of restriction enzymes polymerase chain reaction gel electrophoresis karyotyping

The correct answer is- Polymerase chain reaction.

Polymerase chain reaction is a technique in molecular biology that is used to produce multiple copies of a piece of DNA molecule through multiple cycles of three stages that are-

1) Denaturation- The two DNA strands are separated  ( so that template DNA are exposed) at higher temperature.

2) Annealing- Primers ( forward and reverse) are attached to the template DNA.

3) Extension- New DNA strand is synthesized using enzyme Taq polymerase that adds dNTPs ( deoxyribonucleoside triphosphate) according to the complementary sequences in the template.        

ans.

dna fingerprinting is defined as a process that determines the dna characteristics of an individual. these dna characteristics are unique among individuals as their fingerprints, so it is known as dna fingerprinting.

steps of dna fingerprinting includes extraction of dna from sample, amplification of dna, restriction digestion of amplified dna, and then analysis of dna by gel electrophoresis, respectively.

thus, the next step performed by the scientist is 'to cut the amplified dna (obtained by polymerase chain reaction) by restriction enzymes that cleave the dna into fragments and their analysis.'