DNA Replication

DNA replication takes place in eukaryotic cells during which phase?

• G1

• S

• M

• G0

DNA replication creates two strands of DNA from one. If pink is parental DNA and blue is new DNA - which picture demonstrates the accepted model of DNA replication after the SECOND replication cycle?

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What is the name of this enzyme?

• DNA Helicase

• DNA Ligase

• DNA polyermase

• RNA Polymerase

What enzyme is responsible for the second step of DNA replication?

• DNA Ligase unwinds original DNA strand

• RNA Primase lays down RNA primers for new nucleotide bases.

• RNA polymerase builds new strands by bringing in new nucleotide bases.

• Helicase knits together fragments on lagging strand

Which is the last step of DNA replication?

• RNA Helicase unwinds original DNA strand

• DNA Primase lays down RNA primer for new nucleotide bases.

• RNA polymerase builds new strands by bring in new nucleotide bases.

• Ligase knits together fragments on lagging strand

DNA replication results in

• 2 completely new DNA molecules

• 2 DNA molecules that each contain a strand of the original

• 1 new DNA molecule and 1 old

• 1 new molecule of DNA

Which enzyme is responsible for unwinding the DNA double helix prior to replication?

• DNA polymerase I

• DNA polymerase III

• Helicase

• Ligase

Which enzyme fixes the Okazaki fragments in the lagging strand?

• Helicase

• Polymerase

• Ligase

• Primerase

What are the gaps between the newly synthesized DNA on the lagging strand called?

• Okazaki fragments

• Polymer gaps

• Helicase fragments

• Acidic gaps

3' and 5' refer to...

• How effectively the helicase works

• What direction the nucleotides are pointing

• Where the RNA primer attaches

• Okazaki's famous experiment