An enzyme that is capable of synthesizing new strands of DNA from a single stranded template and free deoxynucleotides under appropriate reaction conditions. During PCR, Roche uses Taq DNA polymerase to make DNA amplicon using the DNA strand as a template. Roche uses rTth DNA polymerase to perform reverse transcription (synthesizing cDNA from RNA) and which then through PCR produces DNA amplicon.
Any enzyme that catalyzes the formation of DNA or RNA from deoxyribonucleotides or ribonucleotides.
A enzyme or ribozyme that makes a polymer out of monomers. For example, RNA polymerase makes RNA out of single nucleotides.