Protein Synthesis Enzymes Quiz
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Which enzyme unwinds the DNA double helix by breaking hydrogen bonds between complementary base pairs?
A. Primase
B. Ligase
C. Topoisomerase
D. Helicase
Which enzyme synthesizes short RNA primers complementary to the DNA template?
A. Primase
B. DNA Polymerase I
C. DNA Polymerase II
D. RNA Polymerase
Which enzyme is responsible for attaching the correct amino acid to its corresponding tRNA molecule?
A. Primase
B. Ligase
C. Peptidyl transferase
D. Aminoacyl-tRNA synthetases
What is the function of DNA Polymerase II in DNA replication?
A. Removes RNA primers & replaces with DNA nucleotides
B. Synthesizes new DNA strand
C. Stabilizes the single-stranded DNA regions
D. Involved in DNA repair processes
Which enzyme initiates and catalyzes the synthesis of RNA from a DNA template?
A. RNA Polymerase
B. DNA Polymerase III
C. Helicase
D. Topoisomerase
What is the function of DNA Polymerase I in DNA replication?
A. Stabilizes the single-stranded DNA regions
B. Seals the nicks between Okazaki fragments
C. Synthesizes new DNA strand
D. Remove RNA primers & replaces with DNA nucleotides
Which enzyme adds nucleotides in a 5′ to 3′ direction during DNA replication?
A. DNA Polymerase III
B. Helicase
C. Topoisomerase
D. Ligase
Which enzyme relieves the torsional strain generated during the unwinding of the DNA double helix by helicase?
A. Topoisomerase
B. RNA Polymerase
C. DNA Polymerase III
D. Ligase
What is the function of Single-Stranded Binding Proteins (SSBs) in DNA replication?
A. Seals the nicks between Okazaki fragments
B. Removes RNA primers
C. Synthesizes new DNA strand
D. Stabilizes the single-stranded DNA regions
Which enzyme seals the nicks or gaps between the Okazaki fragments on the lagging strand?
A. Ligase
B. Primase
C. DNA Polymerase II
D. RNA Polymerase
Which enzyme fills in the gaps left after primer removal in DNA replication?
A. RNA Polymerase
B. DNA Polymerase I
C. DNA Polymerase III
D. Helicase
What is the function of Aminoacyl-tRNA synthetases in protein synthesis?
A. Unwinding the DNA double helix
B. Relieving the torsional strain during DNA replication
C. Catalyzing the formation of peptide bonds
D. Attaching the correct amino acid to its corresponding tRNA molecule
What is the function of Topoisomerase in DNA replication?
A. Seals the nicks between Okazaki fragments
B. Removes RNA primers & replaces with DNA nucleotides
C. Synthesizes new DNA strand
D. Relieves the torsional strain generated during the unwinding of the DNA double helix by helicase
What is the function of RNA Polymerase in gene expression?
A. Relieves the torsional strain during DNA replication
B. Seals the nicks between Okazaki fragments
C. Unwinds the DNA double helix
D. Initiates and catalyzes the synthesis of RNA from a DNA template
Which enzyme catalyzes the formation of peptide bonds between amino acids during translation?
A. DNA Polymerase I
B. Peptidyl transferase
C. Ligase
D. Primase
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