DNA Structure & Replication Review

What shape is DNA?

• Double Helix

• Single Stranded

• Straight Ladder

• None of the above

Which enzyme is responsible for unzipping the double stranded DNA?

• DNA Polymerase

• DNA Ligase

• RNA Primase

• DNA Helicase

Which enzyme is responsible for gluing Okazaki fragments and new nucleotides?

• DNA Primase

• DNA Ligase

• RNA Primase

• DNA Polymerase

What enzyme is responsible for building new strand of DNA?

• DNA Ligase

• DNA Helicase

• DNA Polymerase

• RNA Primase

Which enzyme is responsible for telling DNA Polymerase where to start building?

• RNA Primase

• DNA Helicase

• DNA Ligase

• DNA Polymerase

Which enzyme is also responsible for proofreading DNA after the new strands are built?

• DNA Helicase

• DNA Polymerase

• DNA Ligase

• RNA Primase

What is the purpose of SSB proteins?

• Keeps the DNA strands together

• Keeps the DNA strands seperated

• Keeps the DNA strands from supercoiling

• Builds new strands of DNA

What is the purpose of topoisomerase?

• Keeps the DNA strands seperated

• Keeps the DNA strands together

• Keeps the DNA from supercoiling

• Builds the new strands of DNA

If you have 15% Guanine, how much Thymine do you have?

• 15%

• 20%

• 35%

• 30%

Reorder the following.

• DNA helicase unzips the double stranded DNA

• RNA Primase attaches to the 3' end to tell polymerase where to start building

• DNA polymerase starts building the new strands.

• DNA Ligase glues together the Okazaki fragments and the new nucleotides.

• DNA polymerase proofreads the new strands.