12 Questions
During which phase of the cell cycle does DNA replication take place?
S phase
What is the enzyme responsible for unzipping the DNA molecule at the origins of replication?
Helicase
In which direction does DNA replication occur?
5' to 3'
Where are the nucleotides added in the leading strand during DNA replication?
3' end
What is the function of DNA ligase during DNA replication?
Attaches Okazaki fragments together
What term describes the fact that each new molecule of DNA conserves one strand of DNA from the original molecule?
Semiconservative
What is the function of the enzyme helicase during DNA replication?
It breaks the hydrogen bonds connecting the base pairs
During DNA replication, in which direction do nucleotides get added to the leading strand?
5’ to 3’
What is the role of DNA polymerase during DNA replication?
It finds and attaches free nucleotides to the original template DNA strands
What occurs at the sites called origins of replication during DNA replication?
The DNA molecule unzips with the help of helicase
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
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
Test your knowledge of DNA replication, including the role of helicase, DNA polymerase, and the process of replication in the nucleus during the S phase of the cell cycle.
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