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Prokaryotic DNA Replication

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Questions and Answers

What is the function of the DnaA protein in DNA replication in prokaryotes?

It breaks the hydrogen bonds between base pairs to initiate replication

It creates the Y-shaped replication fork structure

It binds to the G/C-rich sequences in the ori site

It binds to the A/T-rich sequences in the ori site and stretches the double-stranded DNA (correct)

Why is the ori site in prokaryotes mostly comprised of A/T-rich sequences?

A/T-rich sequences are stronger and more stable than G/C-rich sequences

A/T-rich sequences are more compatible with the DnaA protein

G/C-rich sequences are not present in prokaryotic DNA

A/T-rich sequences are easier to break than G/C-rich sequences (correct)

How many replication forks are created during DNA replication in prokaryotes?

Two (correct)

Four

One

Three

Why is the ori site in prokaryotes mostly composed of A/T-rich sequences?

<p>Because A/T-rich regions are relatively weaker to break than G/C-rich sequences</p> Signup and view all the answers

How many replication forks are created during DNA replication in prokaryotes?

<p>Two</p> Signup and view all the answers

Study Notes

DNA Replication in Prokaryotes

DnaA protein binds to the origin of replication (ori) and unwinds the double helix, facilitating the recruitment of other proteins necessary for DNA replication.
The ori site in prokaryotes is mostly comprised of A/T-rich sequences because they are more easily melted, allowing for the initiation of DNA replication.
During DNA replication in prokaryotes, two replication forks are created, one moving clockwise and the other counterclockwise, allowing for bidirectional replication.

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Description

Test your knowledge of prokaryotic DNA replication with our quiz! Learn about the origin of replication and why it contains A/T-rich sequences. Understand the role of DnaA protein in initiating replication and the importance of double-stranded DNA stretching. Put your understanding to the test with our interactive quiz!