DNA Structure and Replication

What is the role of DNA ligase in DNA replication?

• DNA ligase unwinds the DNA helix.

• DNA ligase synthesizes new DNA strands.

• DNA ligase joins Okazaki fragments on the lagging strand.

• DNA ligase removes RNA primers from the DNA.

What is the shape of DNA?

• Single helix

• Double helix (twisted ladder)

• Circular

• Linear

What are the building blocks of DNA?

• Amino Acids

• Nucleotides

• Fatty Acids

• Monosaccharides

What enzyme unwinds and unzips DNA during replication?

• DNA Polymerase

• DNA Ligase

• DNA Helicase

• RNA Primase

What enzyme is responsible for adding the free nucleotides to the replicating DNA?

• RNA polymerase

• DNA ligase

• DNA polymerase

• Helicase

What is the significance of complementary base pairing in DNA?

• It ensures accurate replication and transcription of genetic information.

• It allows for the formation of hydrogen bonds between nucleotides.

• It determines the physical structure of the DNA molecule.

• It facilitates the repair of damaged DNA strands.

What is the difference between leading and lagging strands in DNA replication?

• The leading strand is synthesized continuously, while the lagging strand is synthesized in short segments.

• Both strands are synthesized continuously.

• The leading strand is synthesized in short segments, while the lagging strand is synthesized continuously.

• The leading strand is synthesized in the opposite direction of the lagging strand.

What is the role of RNA primers in DNA replication?

• RNA primers provide a starting point for DNA polymerase to begin synthesis.

• RNA primers are responsible for unwinding the DNA double helix.

• RNA primers act as a template for DNA repair mechanisms.

• RNA primers are involved in the termination of DNA replication.

What is the term for DNA replication that involves reusing the old, or parent, DNA strand?

• Conservative

• Dispersive

• Semi-Conservative

• Fragmented

Which type of bond joins nitrogenous bases in DNA?

• Ionic bonds

• Covalent bonds

• Hydrogen bonds

• Metallic bonds