DNA Structure and Replication Review

Which enzyme is responsible for adding DNA nucleotides from 5' to 3' direction?

• DNA Polymerase

• Ligase

• Single strand binding proteins

• Helicase

These will keep the replication fork from reforming into a double helix before replication has occurred

• RNA Primase

• Single Stranded Binding Proteins

• Topoisomerase

• Helicase

What are the 4 nitrogen bases?

• adenine, thymine, cytoplasm, and guanine
• adenine, thymine cytosine, and guanine
• adenine, thymine, cytosine, and gylcerol
• adenine, thymine, cytosine, and glucose

The DNA nucleotide is composed of three parts. Which two components make up the nucleotide backbone?

• ribose sugar and base
• ribose sugar and phosphate group
• nitrogen base and deoxyribose sugar
• deoxyribose sugar and phosphate group
  

The process of DNA replication is called semi conservative because it results in

• none of these

• two identical DNA molecules. One original molecule and one with two new strands

• two exact copies with new strands

• two identical molecules, each with 1 original strand and one new.

Name this structure

• double helix
• nucelotide
• twisted ladder
• hydrogen bond

Adenine bonds with ______________.

• Guanine
• Thymine
• Cytosine
• Adenine

Guanine bonds with ______________.

• Adenine
• Guanine
• Cytosine
• Thymine

If 20% of a DNA molecule was Adenine (A), what percentage would be Guanine (G)?

• 20%

• 30%

• 80%

• 60%

The enzyme that unwinds the DNA to prepare for replication

• helicase

• replicase

• polymerase

• synthase