DNA Replication Quiz

What is the main function of DNA polymerase during DNA replication?

• To break hydrogen bonds between nitrogenous bases

• To add nucleotides to the growing DNA strand

• To unwind the DNA double helix

• To join Okazaki fragments

Which strand is synthesized continuously during DNA replication?

• Lagging strand

• Leading strand

• Both are synthesized discontinuously

• Neither, DNA replication is not continuous

What is the role of DNA helicase in DNA replication?

• To synthesize RNA primers

• To add nucleotides to the DNA chain

• To unwind the DNA double helix

• To connect Okazaki fragments

Which of the following is NOT a nitrogenous base in DNA?

• Adenine

• Thymine

• Guanine

• Uracil

The lagging strand is synthesized in short segments known as:

• Leading fragments

• DNA helicases

• Okazaki fragments

• Polymerase chains

Which enzyme is responsible for joining Okazaki fragments?

• DNA ligase

• DNA polymerase

• DNA helicase

• RNA primase

What is the sugar component of the DNA backbone?

• Ribose

• Deoxyribose

• Glucose

• Fructose

Which pair of nitrogen bases forms two hydrogen bonds with each other in DNA?

• Adenine and Thymine

• Guanine and Cytosine

• Adenine and Guanine

• Thymine and Cytosine

During DNA replication, the function of the RNA primer is to:

• Serve as a starting point for DNA synthesis

• Add nucleotides to the DNA strand

• Unwind the DNA helix

• Repair mistakes in DNA synthesis

Which of the following enzymes is NOT directly involved in the synthesis of the DNA strand?

• DNA polymerase

• DNA helicase

• DNA ligase

• RNA polymerase