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DNA Replication Overview: Genetics Unit 4

12 Questions

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DNA Replication Overview: Genetics Unit 4

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Questions and Answers

During which phase of the cell cycle does DNA replication take place?

G1 phase

M phase

S phase (correct)

G2 phase

What is the enzyme responsible for unzipping the DNA molecule at the origins of replication?

Helicase (correct)

DNA polymerase

DNA ligase

RNA polymerase

In which direction does DNA replication occur?

5' to 3' (correct)

3' to 5'

Random direction

Bidirectional

Where are the nucleotides added in the leading strand during DNA replication?

3' end Signup and view all the answers

What is the function of DNA ligase during DNA replication?

Attaches Okazaki fragments together Signup and view all the answers

What term describes the fact that each new molecule of DNA conserves one strand of DNA from the original molecule?

Semiconservative Signup and view all the answers

What is the function of the enzyme helicase during DNA replication?

It breaks the hydrogen bonds connecting the base pairs Signup and view all the answers

During DNA replication, in which direction do nucleotides get added to the leading strand?

5’ to 3’ Signup and view all the answers

What is the role of DNA polymerase during DNA replication?

It finds and attaches free nucleotides to the original template DNA strands Signup and view all the answers

What occurs at the sites called origins of replication during DNA replication?

The DNA molecule unzips with the help of helicase Signup and view all the answers

What is the final outcome of DNA replication?

Two identical molecules of DNA, each containing one strand from the original molecule and one new strand Signup and view all the answers

What is meant by semiconservative in the context of DNA replication?

The new molecules of DNA contain one strand from the original molecule and one completely new strand Signup and view all the answers