Exploring the Basics of DNA Replication

Why is DNA replication essential for living organisms?

• To produce energy

• To create proteins

• For growth, repair, and development

• For digestion

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What type of bonds hold the sugar and phosphate backbone of DNA together?

• Hydrogen bonds

• Metallic bonds

• Ionic bonds

• Phosphodiester bonds

Which bonds are weaker and easier to break during DNA replication?

• Hydrogen bonds

• Ionic bonds

• Covalent bonds

• Metallic bonds

What is the role of DNA helicase in DNA replication?

• To synthesize proteins

• To add nucleotides

• To break hydrogen bonds

• To repair DNA

What does DNA helicase do to the DNA helix?

• Repairs mutations

• Unzips the DNA helix

• Breaks covalent bonds

• Binds nucleotides

What is the function of DNA polymerase during DNA replication?

• To unzip the DNA helix

• To break hydrogen bonds

• To add nucleotides to the new DNA strand

• To repair DNA

How does DNA polymerase ensure the accuracy of DNA replication?

• By proofreading and correcting errors

• By adding nucleotides to the new strand

• By breaking hydrogen bonds

• By unzipping the DNA helix

What is meant by semi-conservative replication?

• Using only original strands to make new DNA

• Using both original strands to make new DNA

• Using one original strand and one new strand to make new DNA

• Using only new strands to make new DNA

How many base pairs can E. coli replicate in less than an hour?

• 10 million

• 2 million

• 5 million

• 1 million

What are mutations in the context of DNA replication?

• Broken hydrogen bonds

• Newly added nucleotides

• Repaired DNA strands

• Errors in the DNA sequence

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