DNA Replication Video 01.13.26

What is the primary purpose of DNA replication?

• To create proteins for cell function.

• To make an exact copy of DNA for new cells.

• To repair damaged DNA strands.

• To produce RNA for gene expression.

In eukaryotic cells, during which phase of the cell cycle does DNA replication occur?

• G1 phase

• M phase

• S phase

• G2 phase

Which of the following theories accurately describes how DNA replicates itself?

• Conservative

• Dispersive

• Semi-Conservative

• Random

What are the three main components that make up a DNA nucleotide?

• Amino acid, fatty acid, glycerol

• Sugar, phosphate group, nitrogenous base

• Glucose, fructose, sucrose

• Protein, lipid, carbohydrate

What is the primary function of helicase during DNA replication?

• To add new nucleotides to the growing DNA strand.

• To join Okazaki fragments together.

• To unwind the DNA double helix.

• To synthesize RNA primers.

In which direction does DNA polymerase add new nucleotides to a growing DNA strand?

• 5' to 3' direction.

• 3' to 5' direction.

• Both 5' to 3' and 3' to 5' directions simultaneously.

• Randomly, depending on available nucleotides.

What is the role of an RNA primer in DNA replication?

• To permanently seal gaps between DNA fragments.

• To provide a starting point for DNA polymerase to add nucleotides.

• To unwind the DNA double helix.

• To prevent re-annealing of separated DNA strands.

How do eukaryotic cells typically initiate DNA replication compared to prokaryotic cells?

• Eukaryotic cells have a single origin of replication, while prokaryotic cells have multiple.

• Eukaryotic cells have multiple origins of replication, while prokaryotic cells have a single origin.

• Both eukaryotic and prokaryotic cells have multiple origins of replication.

• Both eukaryotic and prokaryotic cells have a single origin of replication.