DNA Replication Quiz

Why is DNA replication necessary for living organisms?

• It ensures new cells receive a complete copy of DNA

• It helps cells create energy

• It prevents mutations

• It produces proteins directly

What is the term used to describe DNA replication, where each new DNA molecule has one original strand and one new strand?

• Semi-conservative

• Conservative

• Dispersive

• Complementary

What enzyme is responsible for unzipping the DNA molecule?

• Helicase

• DNA ligase

• Primase

• Exonuclease

Which type of bond is broken by helicase during DNA replication?

• Hydrogen bonds

• Covalent bonds

• Peptide bonds

• Ionic bonds

What is the function of single-stranded binding proteins (SSBPs)?

• They prevent the DNA strands from reattaching

• They add nucleotides to new DNA strands

• They break hydrogen bonds between DNA bases

• They proofread for errors

Which enzyme lays down RNA primers to help DNA polymerase begin replication?

• Primase

• Helicase

• DNA polymerase

• Ligase

Why does DNA polymerase require RNA primers?

• It needs a starting point for adding nucleotides

• It cannot function without an enzyme inhibitor

• RNA primers help prevent mutations

• Primers provide energy for replication

DNA polymerase can only add nucleotides in which direction?

• 5’ to 3’

• 3’ to 5’

• In both directions simultaneously

• It does not follow a specific direction

What is the main difference between the leading and lagging strands?

• The leading strand is synthesized continuously, while the lagging strand is synthesized in fragments

• The leading strand requires more primers than the lagging strand

• The leading strand is made of RNA, while the lagging strand is made of DNA

• The leading strand is proofread by exonuclease, while the lagging strand is not

What are the short fragments of DNA formed on the lagging strand called?

• Okazaki fragments

• Ligase fragments

• Telomeres

• Hydrogen fragments