DNA Replication

Question 1

What are four key enzymes in the DNA Replication process?

Answer 1

Helicase, Primase, DNA Polymerase, Ligase.

Question 2

Describe the function of Helicase.

Answer 2

“Unzips” DNA by breaking through hydrogen bonds.

Question 3

Describe the function of Primase.

Answer 3

Flags down the spots where DNA Polymerase needs to build, and makes it able to recognize where it should start.

Question 4

Describe the function of DNA Polymerase.

Answer 4

Replicates single strands of DNA to build another new strand.

Question 5

Describe the function of Ligase.

Answer 5

Bonds or “glues” Okazaki DNA fragments together.

Question 6

How can you know if something is an enzyme?

Answer 6

If it ends with the suffix “-ase”, its likely to be an enzyme.

Question 7

Why do Okazaki fragments occur?

Answer 7

Since DNA Polymerase can only work in the 5’ to 3’ direction, one strand is always lagging to catch up with the “unzipped” DNA.

Question 8

What is the end result of DNA replication?

Answer 8

Two complete helices with one old strand and one new strand.