Multiple Choice
Which of the following correctly lists the three main steps of DNA replication?
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14. DNA Synthesis
Steps of DNA Replication
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What happens during the third step of DNA replication?
A
Ligase joins Okazaki fragments on the lagging strand.
B
DNA polymerase adds nucleotides to the growing DNA strand.
C
The DNA double helix is unwound by helicase.
D
Primase synthesizes RNA primers on the lagging strand.
Verified step by step guidance1
DNA replication is a process that involves several steps to ensure accurate copying of the genetic material. Let's focus on the third step.
During the third step of DNA replication, DNA polymerase plays a crucial role. It is responsible for adding nucleotides to the growing DNA strand.
DNA polymerase works by matching complementary nucleotides to the template strand, ensuring that adenine pairs with thymine and cytosine pairs with guanine.
This enzyme synthesizes the new DNA strand in the 5' to 3' direction, which is essential for the replication process.
It's important to note that DNA polymerase requires a primer to start the addition of nucleotides, which is provided by primase in earlier steps.
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