DNA Replication Quiz

The video discusses DNA replication, its importance in cell division, and the historical experiments that led to the understanding of DNA as the hereditary material. It explains the structure of DNA, the base pairing rules, and the detailed mechanism of DNA replication, including the role of various enzymes. The video also highlights the significance of nucleic acids and the anti-parallel nature of DNA strands.

What is the primary role of DNA in cells?

• To store and transmit genetic information

• To catalyze biochemical reactions

• To serve as a structural component of the cell

• To provide energy for cellular processes

What did Griffith's experiment in the 1920s suggest about inheritance?

• Inheritance is based on proteins

• Inheritance is determined by environmental factors

• Inheritance is purely random

• There is a molecular basis to inheritance

Which scientist's work helped confirm that DNA, not protein, is the genetic material?

• Gregor Mendel

• Frederick Griffith

• Hershey and Chase

• Rosalind Franklin

What is the key structural difference between DNA and RNA?

• DNA contains thymine, while RNA contains uracil

• DNA is single-stranded, while RNA is double-stranded

• DNA contains uracil, while RNA contains thymine

• DNA is made of amino acids, while RNA is made of nucleotides

What type of bond holds the nitrogenous bases together in the DNA structure?

• Covalent bonds

• Peptide bonds

• Ionic bonds

• Hydrogen bonds

Which enzyme is responsible for unwinding the DNA double helix during replication?

• Primase

• Helicase

• Ligase

• DNA polymerase

What is the role of DNA polymerase III in DNA replication?

• To join Okazaki fragments

• To synthesize new DNA strands

• To remove RNA primers

• To unwind the DNA strands

Why are Okazaki fragments formed during DNA replication?

• Because helicase can only unwind DNA in one direction

• Because ligase can only join fragments in the 3' to 5' direction

• Because DNA polymerase can only synthesize in the 5' to 3' direction

• Because DNA polymerase can only synthesize in the 3' to 5' direction

What is the function of telomeres in DNA replication?

• To protect the ends of chromosomes

• To join Okazaki fragments

• To unwind the DNA double helix

• To initiate DNA replication

Which enzyme replaces RNA primers with DNA during replication?

• DNA polymerase I

• DNA polymerase III

• Helicase

• Ligase