Question

Primers are used in both DNA replication and PCR analyses, what are they? A. Single stranded sequences of nucleotides which are complementary to a target sequence. B. Molecules that stabilise the replication fork. C. Short strands of DNA produced by DNA Primase.D. RNA strands that are random sequences of nucleotides on the leading strand. E Sequences of nucleotides that allow RNA polymerase to attach to promotors.

Answer 1

The primers are short sequences of single-stranded DNA (nucleotides sequence with around 20 nucleotides), being two primers used in the DNA replication with the purpose of flank the target region of the DNA. Therefore, the correct alternative is A. single stranded sequences of nucleotides which are complementary to a target sequence.