Exploring the Steps of DNA Replication

The video explains DNA's role as the cell's director, coding for traits. It covers DNA replication, occurring in the nucleus during interphase, not during cell division. Key enzymes like helicase, polymerase, primase, and ligase are introduced, each playing a role in the replication process. The video details the replication steps, including the origin, SSB proteins, and Okazaki fragments, emphasizing the semi-conservative nature of replication. It concludes with DNA polymerase's proofreading ability, ensuring accuracy in DNA replication.

Where does DNA replication occur in eukaryotic cells?

• Mitochondria

• Ribosome

• Nucleus

• Cytoplasm

During which phase of the cell cycle does DNA replication happen?

• Telophase

• Prophase

• Interphase

• Mitosis

What is the role of helicase in DNA replication?

• Gluing DNA fragments

• Creating RNA primers

• Unzipping the DNA strands

• Adding DNA bases

Which enzyme is responsible for building new DNA strands?

• Helicase

• DNA Polymerase

• Primase

• Ligase

What is the function of primase in DNA replication?

• Creating RNA primers

• Proofreading DNA

• Unzipping DNA strands

• Gluing DNA fragments

What are Okazaki fragments associated with?

• Leading strand

• Lagging strand

• RNA primers

• DNA ligase

Which direction does DNA polymerase work in during DNA replication?

• Both directions

• 5' to 3'

• Randomly chooses direction

• 3' to 5'

What is the role of DNA ligase in DNA replication?

• Sealing gaps between DNA fragments

• Adding DNA bases

• Creating RNA primers

• Unzipping DNA strands

What does semi-conservative replication mean?

• DNA is fully conserved without any replication

• Only one strand of DNA is conserved

• Each DNA molecule consists of one old and one new strand

• Both DNA strands are newly synthesized

How does DNA polymerase ensure accuracy during DNA replication?

• By creating RNA primers

• Through its proofreading ability

• By sealing gaps between DNA fragments

• By unzipping DNA strands