DNA Replication Comprehension Check

Why is DNA replication necessary?

• To repair damaged DNA

• To prepare for cell division

• To produce energy

• To eliminate waste

Tags

NGSS.HS-LS1-4

What is the primary function of helicase in DNA replication?

• Synthesizes new DNA strands

• Breaks hydrogen bonds and unwinds DNA

• Repairs DNA mutations

• Joins Okazaki fragments

What do SSB proteins attach to in order to prevent separated DNA from attaching back together?

• The DNA backbone

• The RNA primer

• The helicase

• The replication fork

Which enzyme adds nucleotides to the exposed 3’ end during DNA replication?

• RNA primase

• DNA polymerase I

• DNA polymerase III

• Helicase

What is the function of RNA primase?

• To unwind the DNA helix

• To add RNA nucleotides using DNA as a template

• To remove RNA primers

• To synthesize proteins

What is the replication fork in DNA replication?

• It is where DNA strands are joined.

• It is where the DNA helix is unwound.

• It is where RNA primers are synthesized.

• It is where DNA ligase acts.

What is the direction of DNA synthesis by DNA polymerase III?

• 3' to 5'

• 5' to 3'

• 2' to 4'

• 1' to 3'

Which enzyme is responsible for removing RNA primers during DNA replication?

• Ligase

• Helicase

• DNA polymerase III

• DNA polymerase I

What is the role of DNA ligase in DNA replication?

• To add RNA primers

• To synthesize new DNA strands

• To join Okazaki fragments

• To unwind the DNA helix

Which is true of the leading strand in DNA replication?

• It is synthesized discontinuously

• It is synthesized continuously

• It requires multiple RNA primers

• It is synthesized in the 3' to 5' direction