Exploring DNA Structure and Replication

The video tutorial covers the structure, function, and replication of DNA. It explains DNA as a double-stranded molecule with a double helix shape, consisting of a sugar-phosphate backbone and four nitrogen bases: adenine, cytosine, thymine, and guanine. The order of these bases determines genetic information. The video also describes nucleotides, base pairing rules, and the replication process involving enzymes like DNA helicase and DNA polymerase.

What is one of the primary functions of DNA?

• To produce energy

• To store genetic information

• To digest food

• To transport oxygen

What is the shape of the DNA molecule?

• Quadruple helix

• Triple helix

• Double helix

• Single helix

What are the components of the DNA backbone?

• Protein and sugar

• Lipid and phosphate

• Phosphate and sugar

• Carbohydrate and protein

Which of the following is NOT a DNA base?

• Adenine

• Uracil

• Thymine

• Cytosine

What is a nucleotide composed of?

• A protein, a lipid, and a carbohydrate

• A sugar, a phosphate, and a nitrogen base

• A sugar, a lipid, and a protein

• A phosphate, a lipid, and a carbohydrate

Which base pairs with adenine in DNA?

• Guanine

• Cytosine

• Thymine

• Uracil

What is the term for the opposite orientation of the two DNA strands?

• Convergent

• Parallel

• Anti-parallel

• Perpendicular

What enzyme is responsible for unzipping the DNA during replication?

• DNA polymerase

• RNA polymerase

• DNA helicase

• Ligase

What enzyme adds complementary nucleotides during DNA replication?

• Ligase

• DNA polymerase

• RNA polymerase

• DNA helicase

What is the end result of DNA replication?

• Two different strands of DNA

• Two different strands of RNA

• Two identical strands of DNA

• One strand of DNA and one strand of RNA