The polymerase chain reaction relies upon unusual, heat-resistant ________ that were isolated from bacteria living in hot springs.
A. DNA polymerases
B. phages
C. restriction enzymes
D. plasmids
Answer:A
The polymerase chain reaction relies upon unusual, heat-resistant ________ that were isolated from bacteria living in hot springs.
A. DNA polymerases B. phages C. restriction enzymes D. plasmids