Multiple Choice
What is the result of DNA ligase's action during DNA replication?
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14. DNA Synthesis
Introduction to DNA Replication
Multiple Choice
In the process of DNA replication, what is the primary function of the enzyme helicase?
A
To synthesize new DNA strands
B
To add RNA primers to the DNA template
C
To join Okazaki fragments
D
To unwind the DNA double helix
Verified step by step guidance1
Understand the context of DNA replication: DNA replication is the process by which a cell duplicates its DNA, ensuring that each new cell receives a complete set of genetic instructions.
Identify the role of helicase: Helicase is an enzyme that plays a crucial role in DNA replication by unwinding the DNA double helix, allowing the replication machinery access to the single-stranded DNA templates.
Differentiate helicase from other enzymes: While helicase unwinds the DNA, other enzymes like DNA polymerase synthesize new DNA strands, and ligase joins Okazaki fragments on the lagging strand.
Visualize the unwinding process: Imagine the DNA double helix as a twisted ladder. Helicase moves along the DNA, separating the two strands by breaking the hydrogen bonds between the nucleotide bases, effectively 'unzipping' the ladder.
Recognize the importance of helicase: Without helicase, the replication machinery would not be able to access the DNA strands, halting the replication process. This highlights helicase's essential role in initiating DNA replication.
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