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DNA Replication Quiz

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Questions and Answers

What is the function of DNA polymerase III holoenzyme during elongation?

It encircles the lipid strand

It encircles the DNA strand (correct)

It encircles the RNA strand

It encircles the protein strand

In which direction does DNA polymerase III read parental strands?

2'→5'

5'→2'

3'→5' (correct)

5'→3'

What is the direction of DNA synthesis on the lagging strand?

2'→5'

5'→2'

3'→5'

5'→3' (correct)

What is the name given to the DNA strand synthesized from the origin of replication to replication fork?

Leading strand Signup and view all the answers

What is the name given to the DNA strand synthesized from replication fork to origin of replication site?

Lagging strand Signup and view all the answers

What is the direction of DNA synthesis on the leading strand?

5'→3' Signup and view all the answers

What is the name of the enzyme that holds the DNA polymerase III onto the strand during elongation?

DNA clamp loader Signup and view all the answers

What is the name of the enzyme that synthesizes complimentary DNA bi-directionally from the origin of replication?

DNA polymerase III Signup and view all the answers

What is the direction of DNA synthesis on the lagging strand?

3'→5' Signup and view all the answers

What is the name of the DNA strand that is used as a template during DNA replication?

Template strand Signup and view all the answers

Study Notes

DNA Replication

During elongation, DNA polymerase III holoenzyme synthesizes new DNA strands by adding nucleotides to the primer sequence.

Direction of DNA Synthesis

DNA polymerase III reads the parental strands in the 3' to 5' direction.
On the lagging strand, DNA synthesis occurs in short, discontinuous segments called Okazaki fragments, in the 5' to 3' direction.
On the leading strand, DNA synthesis occurs continuously in the 5' to 3' direction.

DNA Strands

The DNA strand synthesized from the origin of replication to the replication fork is called the leading strand.
The DNA strand synthesized from the replication fork to the origin of replication site is called the lagging strand.
The DNA strand used as a template during DNA replication is called the parental strand or template strand.

Enzymes Involved

The enzyme that holds the DNA polymerase III onto the strand during elongation is called the clamp loader.
The enzyme that synthesizes complimentary DNA bi-directionally from the origin of replication is called the helicase.

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Description

Test your knowledge on DNA replication with this quiz! From the process of elongation to the specific functions of DNA polymerase III holoenzyme, challenge yourself to see how much you know about the bi-directional synthesis of DNA. Get ready to learn more about the directionality of parental strands and other key concepts in DNA replication.