Which protein is needed to lay down a segment of RNA complementary to the DNA before replication can begin?
A)RNA polymerase II
B)Primase
C)Helicase
D)Topoisomerase
E)Ligase

Question

Quizplus · Accepted Answer

Primase is the enzyme responsible for synthesizing the short RNA primer that provides the 3'-OH group required for DNA polymerase to initiate replication. Therefore, it is necessary to lay down a segment of RNA complementary to the DNA before replication can begin. RNA polymerase II, helicase, topoisomerase and ligase are also involved in DNA replication, but do not perform this specific function.

Which Protein Is Needed to Lay Down a Segment of RNA