DNA Replication (from video transcript)

Which enzyme is responsible for unwinding the DNA double helix?

• RNA primase

• DNA helicase

• DNA ligase

• DNA polymerase

What is the role of DNA polymerase during DNA replication?

• Forms the replication fork

• Adds nucleotides to the new strand

• Unwinds the DNA strands

• Joins Okazaki fragments

In which direction does DNA polymerase synthesize a new strand?

• Both directions simultaneously

• Five prime to three prime

• Three prime to five prime

• Random direction

What is the function of DNA ligase in DNA replication?

• Joins DNA fragments

• Synthesizes RNA primers

• Adds nucleotides to the new strand

• Unwinds the DNA strands

What are the fragments called that are formed on the lagging strand?

• Okazaki fragments

• Leading fragments

• Replication fragments

• Helicase fragments

Which enzyme is not shown in the diagram but is crucial for unwinding DNA?

• DNA helicase

• DNA ligase

• DNA polymerase

• Topoisomerase

What type of bonds does DNA ligase form between DNA fragments?

• Hydrogen bonds

• Ionic bonds

• Phosphodiester bonds

• Covalent bonds

What is the end of the DNA strand called that terminates in a phosphate group?

• Five prime end

• Lagging end

• Three prime end

• Leading end

What is the primary function of DNA helicase?

• Synthesizes new DNA strands

• Repairs DNA damage

• Joins DNA fragments

• Unwinds the DNA double helix

Which strand is synthesized continuously during DNA replication?

• Lagging strand

• Both strands

• Leading strand

• Neither strand