Multiple Choice
In the overview of DNA replication, which enzyme is responsible for unzipping (separating) the two strands of the DNA double helix at the replication fork?
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8. DNA Replication
Overview of DNA Replication
Multiple Choice
In an overview of DNA replication, what type of molecule is DNA helicase?
A
A lipid that forms the nuclear membrane
B
A nucleic acid primer that initiates DNA synthesis
C
A structural carbohydrate that stabilizes the replication fork
D
An ATP-dependent enzyme (protein) that unwinds the DNA double helix
Verified step by step guidance1
Understand that DNA helicase is involved in the process of DNA replication, specifically in unwinding the DNA double helix to allow replication to proceed.
Recall the types of biological macromolecules: lipids, nucleic acids, carbohydrates, and proteins, and their general functions in the cell.
Recognize that DNA helicase is not a lipid (which forms membranes), nor a nucleic acid primer (which is RNA or DNA that initiates synthesis), nor a carbohydrate (which provides structural support).
Identify that DNA helicase is an enzyme, which means it is a protein that catalyzes a specific biochemical reaction—in this case, unwinding DNA.
Note that DNA helicase requires energy to function, which it obtains by hydrolyzing ATP, making it an ATP-dependent enzyme that unwinds the DNA double helix.
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