Question

List at least 4 enzymes known to be involved in the replication of DNA in bacteria:

A) DNA gyrase, primase, ligase, helicase
B) RNA polymerase, exonuclease, telomerase, polymerase III
C) DNA polymerase I, II, III, topoisomerase
D) Helicase, primase, ligase, gyrase

Answer 1

Enzymes crucial for DNA replication in bacteria include DNA polymerase I, II, and III, DNA gyrase, primase, DNA helicase, and DNA ligase, with DNA polymerase III being primarily responsible for DNA synthesis.

Step-by-step explanation:

The enzymes involved in the replication of DNA in bacteria include:

1. DNA polymerase I, II, III: DNA polymerase III is responsible for the synthesis of DNA. Polymerases I and II are involved in repair mechanisms.
2. DNA gyrase and topoisomerase: These enzymes reduce the supercoiling of DNA that occurs as the helix unwinds during replication.
3. Primase: This enzyme synthesizes RNA primers necessary for DNA polymerase to begin replication.
4. DNA helicase: It unwinds the DNA double helix to make the strands accessible for replication.
5. DNA ligase: It joins the Okazaki fragments together on the lagging strand to create a continuous DNA strand.

Therefore, the correct answer to the list of enzymes is option C: DNA polymerase I, II, III, and topoisomerase which includes DNA gyrase.