DNA Replication

Why is DNA replication crucial for cell division?

• It helps cells to move faster.

• It allows cells to grow larger.

• It prevents cells from dying.

• It ensures each new cell has a complete set of DNA.

Which model of DNA replication was confirmed by the Meselson-Stahl experiment?

• Random

• Semi-conservative

• Conservative

• Dispersive

What are the three main components of a DNA nucleotide?

• Sugar, lipid, protein

• Sugar, phosphate, nitrogenous base

• Phosphate, lipid, nitrogenous base

• Protein, sugar, nitrogenous base

How do the two strands of DNA run in relation to each other?

• Identical

• Anti-parallel

• Parallel

• Perpendicular

What is the role of helicase in DNA replication?

• It binds DNA strands together.

• It unwinds the DNA double helix.

• It repairs DNA mutations.

• It adds nucleotides to the DNA strand.

Why is the lagging strand named so in DNA replication?

• It is synthesized faster than the leading strand.

• It does not require a primer.

• It is synthesized in short fragments.

• It is synthesized continuously.

What is the function of DNA polymerase during replication?

• It unwinds the DNA helix.

• It adds new nucleotides to the growing DNA strand.

• It removes RNA primers.

• It joins Okazaki fragments.

What is the role of DNA ligase in DNA replication?

• It synthesizes RNA primers.

• It joins Okazaki fragments on the lagging strand.

• It adds nucleotides to the leading strand.

• It unwinds the DNA helix.

In prokaryotic cells, how does DNA replication differ from eukaryotic cells?

• It occurs in multiple locations simultaneously.

• It starts at a single origin of replication.

• It does not require enzymes.

• It is slower than in eukaryotic cells.

What is a replication fork in DNA replication?

• A point where DNA is synthesized continuously.

• A point where DNA is damaged.

• A point where DNA strands are separated and replication occurs.

• A point where DNA strands are joined.