Which enzyme catalyzes bond formation between the 5' phosphate of a nucleotide and the 3' OH group of another nucleotide?

Which enzyme catalyzes bond formation between the 5' phosphate of a nucleotide and the 3' OH group of another nucleotide?

• A. DNA polymerase
• B. RNA polymerase
• C. Primase
• D. Both A and B

Answer: (D)

The enzyme responsible for catalyzing the formation of bonds between the 5' phosphate of a nucleotide and the 3' hydroxyl (OH) group of another nucleotide is crucial for the synthesis of nucleic acids, including both DNA and RNA. Both DNA polymerase and RNA polymerase perform this function during their respective synthesis processes. DNA polymerase plays a key role in DNA replication, where it adds nucleotides to the growing DNA strand by forming phosphodiester bonds between incoming nucleotides and the existing strand, specifically linking the 5' phosphate of the new nucleotide to the 3' OH of the last nucleotide. RNA polymerase serves a similar function during transcription, where it synthesizes RNA from a DNA template. It also catalyzes the formation of phosphodiester bonds in the same manner, joining nucleotides together to form RNA strands. Primase, while closely related, specifically synthesizes short RNA primers during DNA replication and does not itself elongate nucleic acids beyond these primers. Therefore, it is not included in the correct answer. Thus, both DNA polymerase and RNA polymerase are capable of catalyzing the formation of these crucial bonds, making the correct choice one that includes both enzymes.

The enzyme responsible for catalyzing the formation of bonds between the 5' phosphate of a nucleotide and the 3' hydroxyl (OH) group of another nucleotide is crucial for the synthesis of nucleic acids, including both DNA and RNA. Both DNA polymerase and RNA polymerase perform this function during their respective synthesis processes.

DNA polymerase plays a key role in DNA replication, where it adds nucleotides to the growing DNA strand by forming phosphodiester bonds between incoming nucleotides and the existing strand, specifically linking the 5' phosphate of the new nucleotide to the 3' OH of the last nucleotide.

RNA polymerase serves a similar function during transcription, where it synthesizes RNA from a DNA template. It also catalyzes the formation of phosphodiester bonds in the same manner, joining nucleotides together to form RNA strands.

Primase, while closely related, specifically synthesizes short RNA primers during DNA replication and does not itself elongate nucleic acids beyond these primers. Therefore, it is not included in the correct answer.

Thus, both DNA polymerase and RNA polymerase are capable of catalyzing the formation of these crucial bonds, making the correct choice one that includes both enzymes.