DNA Replication

The picture below shows the steps of DNA replication beginning with step one and ending with step three. Because you are re-using the old (or parent) strand, DNA replication is said to be:

• semi-conservative

• semi-discontinuous

• continuous

• fully conserved

What is the name of the enzyme that unwinds the DNA?

• Helicase

• DNA polymerase

• Ligase

• RNA Polymerase

Match the nucleotide with its complementary nucleotide. (DNA to DNA)

Adenine bonds with:

• Thymine

• Cytosine

• Guanine

• Uracil

Match the nucleotide with its complementary nucleotide. (DNA to DNA)

Cytosine bonds with:

• Thymine

• Cytosine

• Guanine

• Uracil

Which enzyme is responsible for adding the free/new nucleotides to the replicating DNA?

• Helicase

• DNA Polymerase

• Ligase

• RNA Polymerase

Which is the first step in DNA Replication?

• Helicase unzips the original DNA strand

• DNA Polymerase builds new strands by bringing in new nucleotide bases.

• RNA Primase lays down an RNA primer

• Ligase seals the gaps between the fragments

• DNA Polymerase changes the RNA primer to DNA nucleotides

Which is the second step in DNA Replication?

• Helicase unzips the original DNA strand

• DNA Polymerase builds new strands by bringing in new nucleotide bases.

• RNA Primase lays down an RNA primer

• Ligase seals the gaps between the fragments

• DNA Polymerase changes the RNA Primer to DNA nucleotides

Which is the third step in DNA Replication?

• Helicase unzips the original DNA strand

• DNA Polymerase builds new strands by bringing in new nucleotide bases.

• RNA Primase lays down an RNA primer

• Ligase seals the gaps between the fragments

• DNA Polymerase changes the RNA Primer to DNA nucleotides

Which is the fourth step in DNA Replication?

• Helicase unzips the original DNA strand

• DNA Polymerase builds new strands by bringing in new nucleotide bases.

• RNA Primase lays down an RNA primer

• Ligase seals the gaps between the fragments

• DNA Polymerase changes the RNA Primer to DNA nucleotides

Which is the fifth step in DNA Replication?

• Helicase unzips the original DNA strand

• DNA Polymerase builds new strands by bringing in new nucleotide bases.

• RNA Primase lays down an RNA primer

• Ligase seals the gaps between the fragments

• DNA Polymerase changes the RNA Primer to DNA nucleotides