The primers in PCR are
A)fragments of mRNA.
B) designed to base pair with mRNA.
C)free nucleotides.
D)radioactive.
E)none of these.

Question

The primers in PCR are
A)fragments of mRNA. 
B) designed to base pair with mRNA.
C)free nucleotides.
D)radioactive.
E)none of these.

Quizplus · Accepted Answer

Primers in PCR are short single-stranded DNA sequences that are designed to base pair with the template DNA strands, not mRNA. Free nucleotides are the building blocks of DNA and are used in PCR to elongate the newly synthesized DNA strands. PCR primers can be labeled with a fluorescent or dye molecule, but they are not typically radioactive.

The Primers in PCR Are