Exploring DNA Replication Concepts

The video tutorial explains DNA replication, starting with a review of DNA's structure as a double helix. It details the replication process, where the original DNA strand is unzipped by enzymes, allowing free nucleotides to pair with complementary bases, resulting in two identical DNA strands. This process is essential for cell division during mitosis, ensuring each new cell has a complete DNA copy. The tutorial also covers the role of enzymes like helicase and DNA polymerase in the semi-conservative replication mechanism.

What does DNA stand for?

• Deoxyribonucleic Acid

• Deoxyribose Nucleic Acid

• Deoxyribose Nucleic Alkaline

• Deoxyribonucleic Alkaline

What is the structure of DNA known as?

• Single Helix

• Double Helix

• Triple Helix

• Quadruple Helix

What does it mean to replicate DNA?

• To mutate it

• To destroy it

• To copy it

• To repair it

What is the first step in DNA replication?

• Creating a new cell

• Synthesizing proteins

• Unzipping the DNA strand

• Pairing nucleotides

Which enzyme is responsible for unzipping the DNA strand?

• Ligase

• Helicase

• DNA Polymerase

• Primase

What are the base pair rules in DNA?

• A pairs with G, T pairs with C

• A pairs with T, G pairs with C

• A pairs with C, G pairs with T

• A pairs with A, G pairs with G

Why is DNA replication necessary?

• To destroy old cells

• To ensure each new cell has a copy of DNA

• To create new proteins

• To mutate the DNA

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

• Mitosis

• Interphase

• Cytokinesis

• Prophase

Which enzyme synthesizes new DNA strands by pairing free nucleotides with the original DNA template?

• Ligase

• Primase

• DNA Polymerase 3

• Helicase

What does it mean that DNA replication is semi-conservative?

• Each new DNA molecule has two new strands

• Each new DNA molecule has no strands

• Each new DNA molecule has one old and one new strand

• Each new DNA molecule has two old strands