Under pharmacist supervision, pharmacy technicians: 1  supply medicines to patients, whether on prescription or over the counter. 2  assemble medicines for prescriptions.
A primer is a short nucleic acid sequence that provides a starting point for DNA synthesis. In living organisms, primers are short strands of RNA. A primer must be synthesized by an enzyme called primase, which is a type of RNA polymerase, before DNA replication can occur.
PCR is a DNA polymerase reaction and as with any polymerase reaction it requires a DNA template and a free 3'-OH. The template is provided by the DNA sample to be amplified and the free 3'-OH are provided by site-specific oligonucleotide primers.