U3L5E Protein Synthesis Enzymes

Which enzyme unwinds the DNA double helix by breaking hydrogen bonds between complementary base pairs?

• Primase

• Ligase

• Topoisomerase

• Helicase

Which enzyme relieves the torsional strain generated during the unwinding of the DNA double helix by helicase?

• Topoisomerase

• RNA Polymerase

• DNA Polymerase III

• Ligase

What is the function of Single-Stranded Binding Proteins (SSBs) in DNA replication?

• Seals the nicks between Okazaki fragments

• Removes RNA primers

• Synthesizes new DNA strand

• Stabilizes the single-stranded DNA regions

Which enzyme synthesizes short RNA primers complementary to the DNA template?

• Primase

• DNA Polymerase I

• DNA Polymerase II

• RNA Polymerase

Which enzyme adds nucleotides in a 5' to 3' direction during DNA replication?

• DNA Polymerase III

• Helicase

• Topoisomerase

• Ligase

What is the function of DNA Polymerase I in DNA replication?

• Stabilizes the single-stranded DNA regions

• Seals the nicks between Okazaki fragments

• Synthesizes new DNA strand

• Remove RNA primers & replaces with DNA nucleotides

Which enzyme seals the nicks or gaps between the Okazaki fragments on the lagging strand?

• Ligase

• Primase

• DNA Polymerase II

• RNA Polymerase

What is the function of DNA Polymerase II in DNA replication?

• Removes RNA primers & replaces with DNA nucleotides

• Synthesizes new DNA strand

• Stabilizes the single-stranded DNA regions

• Involved in DNA repair processes

Which enzyme initiates and catalyzes the synthesis of RNA from a DNA template?

• RNA Polymerase

• DNA Polymerase III

• Helicase

• Topoisomerase

What is the function of Aminoacyl-tRNA synthetases in protein synthesis?

• Unwinding the DNA double helix

• Relieving the torsional strain during DNA replication

• Catalyzing the formation of peptide bonds

• Attaching the correct amino acid to its corresponding tRNA molecule