DNA Replication

Question 1

DNA polymerase needs … to start replication

Answer 1

Primers

Question 2

What does the primer allow

Answer 2

Allows DNA polymerase to add DNA nucleotides, using complementary base pairing.

Question 3

What are the fragments of DNA joined together by

Answer 3

Ligase

Question 4

What strand is replicated continuously

Answer 4

Leading strand

Question 5

What strand is replicated in fragments

Answer 5

Lagging strand

Question 6

What happens when DNA is unwound

Answer 6

DNA is unwound and hydrogen bonds between bases are broken to form two template strands.

Question 7

What is a primer

Answer 7

A primer is a short strand of nucleotide which binds to the 3’ end of the template DNA strand.

Question 8

Explain the role of DNA ligase in DNA replication

Answer 8

DNA ligase joins the fragments(lagging strand) together.

Question 9

DNA polymerase…

Answer 9

Can only add nucleotides in one direction(3’ to 5’), resulting in the leading strand being replicated continuously and the lagging strand being replicated in fragments.