Yr 10 Science - DNA Replication Quiz

What does DNA stand for?

• Deoxyribonucleic acid

• • Ribonucleic acid

• • Dihydroxyribonucleic acid

• Double-stranded nucleic acid

Which nitrogenous base pairs with adenine in DNA?

• • Thymine

• • Cytosine

• • Guanine

• • Uracil

During DNA replication, which enzyme unwinds the DNA double helix?

• • Helicase

• • DNA polymerase

• • RNA polymerase

• • Ligase

Which strand of DNA is synthesized continuously during replication?

• • Leading strand

• • Lagging strand

• • Template strand

• • Complementary strand

What is the function of DNA polymerase?

• • Adds complementary nucleotides

• • Unwinds DNA

• • Joins Okazaki fragments

• • Repairs damaged DNA

What are Okazaki fragments?

• • Short DNA segments on the lagging strand

• • Long DNA segments on the leading strand

• • RNA primers

• • Proteins involved in replication

Which phase of the cell cycle does DNA replication occur?

• • S phase

• • G1 phase

• • G2 phase

• • M phase

Why is DNA replication important?

• Ensures accurate transmission of genetic information

• • Produces energy for the cell

• • Creates new DNA molecules

• • Forms RNA

Which nitrogenous base pairs with guanine in DNA?

• • Cytosine

• • Thymine

• • Adenine

• • Uracil

What is the role of RNA primase during DNA replication?

• • Adds complementary nucleotides

• • Unwinds DNA

• • Synthesizes RNA primers

• • Joins Okazaki fragments