DNA Replication Components
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Origin of Replication
Replication of chromosomes begins here.
DNA creates daughters by using the parent strand as a template/guide.
DNA pol III remains in the replication fork on a template strand and continuously adds nucleotides to the new complementary strand as the fork progresses. The DNA strand made b this is the leading strand.
A primase "reads" the tempate DNA and initiates sythesis of a short complementary RNA primer. A DNA polymerase extends the primed segments, forming Okazaki fragments. The RNA primers are then removed and replaced with DNA, and the fragments of DNA are joined together by DNA ligase.
Begins DNA replication by providing beginning nucleotides.
A Y-shaped region where the parental strands of DNA are being unwound.
Synthesizes the RNA primer using the parental DNA as template.
Single-Strand Binding Proteins
Stabilize the unwound parental strands.
Unwinds and separates the parental DNA strand.
Breaks, swivels, and rejoins the parental DNA ahead of the replication fork, relieving the strain caused by unwinding.
Catalyze the synthesis of new DNA by adding nucleotides to a preexisting chain.
Joins the sugar-phosphate backbones of all the Okazaki fragments into a continuous DNA strand.
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