DNA Replication Processes and Enzymes

This video tutorial explains the process of DNA replication, highlighting the role of various enzymes and proteins. It covers the initiation, elongation, and termination phases, emphasizing the precision required to avoid errors. The tutorial also discusses the differences in replication between prokaryotes and eukaryotes, including the challenges posed by linear chromosomes in eukaryotes and the mechanisms to overcome them.

What is the primary function of DNA replication?

• To synthesize proteins

• To repair damaged DNA

• To make exact copies of DNA

• To create new genetic material

Which enzyme is responsible for unwinding the DNA double helix?

• Helicase

• DNA polymerase

• Primase

• Ligase

What is the role of single-strand binding proteins (SSBs) in DNA replication?

• To join Okazaki fragments

• To prevent rejoining of single-stranded DNA

• To unwind the DNA helix

• To synthesize RNA primers

What is the role of topoisomerase in DNA replication?

• To unwind the DNA helix

• To relieve torsional stress

• To synthesize RNA primers

• To join DNA fragments

In eukaryotes, which DNA polymerase synthesizes the leading strand?

• DNA polymerase Delta

• DNA polymerase Beta

• DNA polymerase Alpha

• DNA polymerase Gamma

What is the function of DNA ligase in DNA replication?

• To unwind the DNA helix

• To synthesize RNA primers

• To join DNA fragments

• To remove RNA primers

Which enzyme is responsible for removing RNA primers and replacing them with DNA?

• DNA polymerase I

• Ligase

• DNA polymerase III

• Helicase

Which enzyme synthesizes RNA primers during DNA replication?

• Ligase

• Primase

• Helicase

• DNA polymerase

What problem arises during the replication of linear chromosomes in eukaryotes?

• Formation of Okazaki fragments

• End replication problem

• Excessive supercoiling

• Bidirectional replication

Which protein is involved in the termination of DNA replication in prokaryotes?

• Tus protein

• Helicase

• Primase

• DNA polymerase