8.2 DNA Replication

Question 1

Helicase

Answer 1

Separates the DNA strands

Question 2

Primase

Answer 2

Lays down the RNA primer

Question 3

Ligase

Answer 3

Glues together the Okazaki Fragments

Question 4

DNA Polymerase III

Answer 4

The main DNA builder, makes 1,000 bases every second

Question 5

DNA Polymerase I

Answer 5

Removes RNA primers, corrects mistakes, reduces errors from 1/10,000 to 1/100,000,000, makes 20 beses every second

Question 6

Which direction does the leading strand go?

Answer 6

Toward the replication fork

Question 7

Which direction does the lagging strand go?

Answer 7

Away from the replication fork

Question 8

Which direction does DNA replication happen?

Answer 8

From the 5’ end to the 3’ end

Question 9

What is the parent strand?

Answer 9

The original DNA strand that is being replicated

Question 10

What are Okazaki Fragments?

Answer 10

Pieces of the lagging strand

Question 11

What is the first step of replication?

Answer 11

Nucleotides start as a nucleoside, which has 3 phosphate groups

Question 12

What is the second step of replication?

Answer 12

The nucleoside is turned into a nucleotide and 2 phosphate groups

Question 13

What is the third step of replication?

Answer 13

DNA Polymerase III attaches 2 phosphates to a new nucleotides, making a nucleoside

Question 14

What is the fourth step of replication?

Answer 14

Repeat the first three steps until the DNA is replicated.