DNA Replication

Question 1

Why does DNA replicate ?

Answer 1

• cells copy genetic information before cell division so that each new cell has a complete set o DNA

Question 2

What is the 1st step on DNA replication?

Answer 2

Unwind : topoisomerase

Question 3

What is the 2nd step on DNA replication?

Answer 3

Unzip: DNA helicase “unzips “

Question 4

What is the 3rd step on DNA replication?

Answer 4

Hold open : single-strand binding proteins (SSBS) keep strands separated

Question 5

What is the 4th step on DNA replication?

Answer 5

Base pairing : DNA polymerase III

Question 6

What is the 5th step on DNA replication?

Answer 6

Proofread : DNA POLYMERASE ! proofreads new strand and backtracks to correct error

Question 7

What is the 6th step on DNA replication?

Answer 7

Joining Nucleotide : DNA ligase bonds those nucleotides together

Question 8

What is the result of DNA replication ?

Answer 8

2 identical DNA molecules

Question 9

Why is it called semi- conservative replication ?

Answer 9

Because each strand has one new strand and one old strand

Question 10

Replication fork:
-Leading strand is made ____ ( no breaks )
- goes on the ____ direction of the replication fork

Answer 10

Made continuously and goes on the same direction

Question 11

Replication fork :
Okazaki fragments aka ____ ____
Goes in the ____ direction of the replication fork

Answer 11

Lagging strand / opposite direction