DNA replication (Topic 7.1)

Which enzyme is responsible for unwinding and separating the DNA strands?

• DNA primase

• DNA gyrase

• Helicase

• DNA polymerase

Which strand is the leading strand?

• 5' - 3'

• 3' - 5'

Which enzyme is responsible for adding DNA nucleotides to the replicated strand?

• Helicase

• DNA polymerase III

• DNA polymerase I

• DNA gyrase

Which strand is replicated continuously?

• Leading

• Lagging

Which strand is replicated in the opposite direction to the replication fork?

• Leading

• Lagging

What is the name of the fragments of DNA on the lagging strand?

• Okazaki fragments

• Hershey fragments

• Stahl fragments

• Franklin fragments

What is the name of the enzyme that replaces the RNA primers with DNA nucleotides?

• DNA polymerase I

• DNA polymerase II

• DNA primase

• DNA ligase

What is the name of the enzyme that links the DNA fragments on the lagging strand together?

• DNA polymerase I

• DNA polymerase II

• DNA primase

• DNA ligase

What type of bonds does helicase break?

• Phosphodiester

• Hydrogen

• Covalent

• Peptide

How many origins of replication (Ori) does eukaryotic DNA have?

• Multiple along its length

• One