DNA Replication Comprehension

What is the direction of the DNA unzipping process?

• Unzipping occurs in one direction only

• Unzipping occurs in two directions simultaneously

• Unzipping occurs randomly in different directions

• Unzipping occurs in the opposite direction of replication

What happens to the bases on each strand when the hydrogen bonds connecting base pairs are broken during DNA replication?

• They remain hidden within the original molecule

• They form new hydrogen bonds with other bases

• They are destroyed and no longer play a role in DNA replication

• They are exposed

What is the role of the enzyme Helicase in DNA replication?

• To repair damaged DNA strands

• To synthesize new DNA strands

• To unwind and separate the DNA strands

• To proofread and correct errors in DNA replication

What is the name of the bond that must be broken to separate the two strands of DNA?

Which enzyme is responsible for bonding nucleotides together to form new strands?

• Helicase

• DNA polymerase

• Ligase

• RNA polymerase

Which organisms does DNA replication occur in?

• Only in eukaryotes

• Only in prokaryotes

• In both eukaryotes and prokaryotes

• DNA replication does not occur in any organisms

What is the reason DNA replication is called semiconservative?

• It creates two new strands

• It conserves two old strands

• It conserves one old strand and creates one new strand

• It creates one old strand and conserves one new strand

What is the result of DNA replication?

• Two identical molecules with two old strands

• Two identical molecules with two new strands

• Two identical molecules with one old strand and one new strand

• Two different molecules with one old strand and one new strand

What is the similarity between DNA replication in eukaryotes and prokaryotes?

• Both involve the synthesis of new DNA strands

• Both occur in the nucleus of the cell

• Both require RNA primers to initiate replication

• Both involve the unwinding of the double helix structure

Label the nucleotide.

a

b

c

nitrogen base

sugar

phosphate