DNA Replication

This enzyme is capable of breaking Hydrogen bonds found between the bases of DNA

• Topoisomerase

• DNA Helicase

• DNA Polymerase

• Exonuclease

What is the purpose of DNA replication?

• Cut the DNA 
• Make more cells
• Apoptosis
• Duplicate the DNA

What is the backbone of DNA made of?

• Nitrogen bases
• Amino acids
• Double H
• Sugar & Phosphate

Why is it crucial that living things are able to replicate their DNA?

• Each cell must have its own DNA
• Less copies of DNA are needed when a new cell is created
• A cell needs multiple copies of DNA
• Only muscle cells need DNA 

Which enzyme is responsible for adding nucleotides?

• Topoisomerase
• DNA Polymerase
• Ligase
• Primase

Okazaki fragments are found on the _______________ strand

• Leading

• Lagging

Which sequence of DNA bases would pair with this partial strand
CAT TCA CTG

• ATG TGA CAG
• TAC ACT GTC
• GTA AGT GAC
• CAT TCA CTG

order of replication

• 3, 4, 2, 1
• 3, 1, 4, 2
• 2, 1, 4, 3
• 3, 4, 1, 2

In what phase of the cell cycle does DNA replication take place?

• G1
• S
• G2
• M

Place the following in sequential order
1. Two new strands, each with old and new
2. Helicase "unzips" DNA by breaking H bonds
3. Primase shows Polymerase where to add nucleotides
4. Ligase joins new fragments together

• 1, 2, 3, 4
• 3, 4, 2, 1
• 3, 2, 4, 1
• 2, 3, 4, 1