4.2 DNA Replication

Question 1

Purpose of DNA replication

Answer 1

make identical copies of DNA

Question 2

What is the first step of the DNA replication process

Answer 2

helicase unzip and unwind the DNA

Question 3

What is the second step of the DNA replication process

Answer 3

primase add new RNA primers

Question 4

What is the third step of the DNA replication process

Answer 4

DNA Polymerase III add new nucleotides to build a complementary strand

Question 5

What is the fourth step of the DNA replication process

Answer 5

DNA Polymerase I replace RNA primers with DNA nucleotides

Question 6

What is the fifth step of the DNA replication process

Answer 6

Ligase joins the remaining fragments together to make the strand continuous

Question 7

Ligase joins fragments together by connecting their backbones. This means that it connects ______.

Answer 7

sugar to phosphate

Question 8

What would happen if ligase were absent?

Answer 8

New DNA strands would be made of disconnected pieces

Question 9

What types of bonds does helicase break?

Answer 9

hydrogen

Question 10

The specific site where DNA replication begins

Answer 10

Origin of replication

Question 11

The Y-shaped region where the parental strands of DNA are being unwound

Answer 11

Replication fork

Question 12

The direction that new DNA strands grow

Answer 12

5’ to 3’

Question 13

The new strand of DNA that can be added to continuously

Answer 13

leading strand

Question 14

Portions of the lagging strand

Answer 14

Okazaki fragments