In an experiment, viruses were marked with radioactive DNA labeled with phosphorus-32, as shown on the left, or radioactive protein, which was labeled with sulfur-35, shown on the right. After the viruses infected bacteria, radiation was found inside only the bacteria that had been infected by the virus that had radioactive DNA.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

c.           is the correct answer