Helicase

Many enzymes are involved in DNA replication. Which is the correct order of enzymes involved in DNA replication from beginning to end?

• Helicase, DNA primase, DNA polymerase, Ligase

• RNA primase, Helicase, DNA polymerase, Ligase

• Helicase, RNA primase, DNA polymerase, Ligase

• DNA primase, Helicase, RNA polymerase, Ligase

Which is the first step?

• DNA Helicase unwinds original DNA strand

• RNA Primase lays down RNA primer for new nucleotide bases.

• DNA polymerase builds new strands by bring in new nucleotide bases.

• Ligase knits together fragments on lagging strand

Enzymes responsible for breaking H bonds between strands

• Helicase

• Ligase

• Polymerase

• Topoisomerase

What is the primary function of helicase in DNA replication?

• Unwinding the DNA double helix

• Synthesizing RNA primers

• Joining Okazaki fragments

• Proofreading newly synthesized DNA

Which enzyme works directly after helicase during DNA replication?

• DNA polymerase

• RNA primase

• Ligase

• Topoisomerase

Helicase is crucial for which of the following processes?

• Transcription

• Translation

• DNA replication

• Protein folding

In which direction does helicase move along the DNA strand?

• 5' to 3'

• 3' to 5'

• Both directions

• Randomly

What type of bonds does helicase break during DNA replication?

• Covalent bonds

• Hydrogen bonds

• Ionic bonds

• Peptide bonds

Which of the following best describes the energy source for helicase activity?

• ATP hydrolysis

• GTP hydrolysis

• NADH oxidation

• FADH2 reduction

Helicase is classified as which type of enzyme?

• Ligase

• Polymerase

• Helicase

• Topoisomerase