Question

Which of the following statements is true about DNA replication?I. DNA Polymerase reads in the 3' to 5' directionII. DNA Polymerase builds in the 3' to 5' directionIII. DNA Polymerase builds in the 5' to 3' directionIV. DNA Polymerase builds the Leading strand away from the replication forkA. III and IVB. I and IIIC. I, III, and IVD. I, II, and IVReset Selection

Answer 1

The correct answer is: B. I and III. DNA polymerase reads in the 3' to 5' direction, and builds in the opposite one, at least the leading strand. Because it can also build DNA in the 3' to 5' direction, but with discontinuos fragments, called okasaki fragments. In either way, fragments are built in the direction of the replication fork.