Final answer:
The reagents needed for a PCR are DNA template, primers, DNA polymerase, and deoxynucleotides (dNTPs).
Step-by-step explanation:
The reagents needed for a PCR (Polymerase Chain Reaction) are DNA template, primers, DNA polymerase, and deoxynucleotides (dNTPs).
DNA template: This is the target DNA sequence that is going to be amplified in the PCR reaction.
Primers: These are short pieces of DNA that are complementary to the ends of the target DNA sequence. They serve as starting points for DNA synthesis.
DNA polymerase: This enzyme synthesizes new DNA strands using the DNA template and the primers.
Deoxynucleotides (dNTPs): These are the building blocks of DNA and are needed for DNA synthesis.