Multiple Choice
In the overview of DNA replication, which enzyme is responsible for “unzipping” the DNA double helix by breaking hydrogen bonds between base pairs at the replication fork?
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8. DNA Replication
Overview of DNA Replication
Multiple Choice
Where does DNA replication primarily take place in eukaryotic cells?
A
In the Golgi apparatus as proteins are processed
B
In the nucleus during S phase of the cell cycle
C
In lysosomes where nucleic acids are degraded
D
In the cytosol on free ribosomes
Verified step by step guidance1
Identify the cellular locations mentioned in the options: Golgi apparatus, nucleus, lysosomes, and cytosol.
Recall that DNA replication is the process of copying the cell's DNA before cell division, which occurs in eukaryotic cells.
Understand that DNA is housed within the nucleus in eukaryotic cells, making it the primary site for DNA replication.
Recognize that DNA replication specifically occurs during the S phase (Synthesis phase) of the cell cycle, when the cell prepares to divide.
Conclude that the correct location for DNA replication is the nucleus during the S phase, as opposed to other organelles like the Golgi apparatus, lysosomes, or cytosol.
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