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WorksheetsU3L5E Protein Synthesis Enzymes
Total questions: 15
Worksheet time: 8mins
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
Which enzyme catalyzes the formation of peptide bonds between amino acids during translation?
DNA Polymerase I
Peptidyl transferase
Ligase
Primase
What is the function of Topoisomerase in DNA replication?
Seals the nicks between Okazaki fragments
Removes RNA primers & replaces with DNA nucleotides
Synthesizes new DNA strand
Relieves the torsional strain generated during the unwinding of the DNA double helix by helicase
Which enzyme fills in the gaps left after primer removal in DNA replication?
RNA Polymerase
DNA Polymerase I
DNA Polymerase III
Helicase
What is the function of RNA Polymerase in gene expression?
Relieves the torsional strain during DNA replication
Seals the nicks between Okazaki fragments
Unwinds the DNA double helix
Initiates and catalyzes the synthesis of RNA from a DNA template
Which enzyme is responsible for attaching the correct amino acid to its corresponding tRNA molecule?
Primase
Ligase
Peptidyl transferase
Aminoacyl-tRNA synthetases
