Exploring DNA Replication in Bacteria

DNA replication is a conserved process across organisms, involving initiation, elongation, and termination phases. The initiation phase begins with the opening of the DNA double helix at the origin of replication, followed by the loading of helicase and primase to prepare the DNA for synthesis. During elongation, DNA polymerase extends the DNA strands, with the leading strand synthesized continuously and the lagging strand in Okazaki fragments. The termination phase concludes replication as the replication forks meet, and the DNA strands are joined by ligase, resulting in semiconservative replication.

What is the role of DNA helicase in the initiation of DNA replication?

• Creates RNA primers

• Unwinds the DNA double helix

• Synthesizes new DNA strands

• Joins Okazaki fragments

Which enzyme is responsible for synthesizing a short RNA primer during DNA replication?

• DNA polymerase

• Primase

• Helicase

• Ligase

What is the function of the sliding clamp in DNA replication?

• It unwinds the DNA double helix

• It joins Okazaki fragments

• It helps DNA polymerase to stay attached to the DNA

• It synthesizes RNA primers

How are Okazaki fragments connected during DNA replication?

• By DNA helicase

• By primase

• By DNA polymerase

• By DNA ligase

What describes the semi-conservative nature of DNA replication?

• New DNA molecules are made entirely of RNA

• Each new DNA molecule consists of one parent strand and one new strand

• Each new DNA molecule consists of two new strands

• New DNA molecules are exact copies without the parent DNA