Question

what does a primer do

Answer 1

it's a starting point to a DNA synthesis. it's needed because DNA polymerase needs something to add nucleotides to

Answer 2

Primer is a strand of DNA that is used to amplify a segment of DNA. usually two primers are used while doing PCR, one at 3' and another at 5' end. Primers are important because the DNA polymerase enzymes can only add nucleotides to existing strands of DNA.

Answer 3

primer provide free 3'end which is necessary for DNA polymerase because it add nucleotides at 3' end only