DNA Replication Learning Goal: How does DNA replicate itself?

DNA Replication

Learning Goal: How does DNA replicate itself?

DNA Replication

? When cells divide, each new cell contains an exact copy of the original cell's DNA How does this happen?

?Before a cell divides, DNA makes an identical copy of itself DNA replication

How big is the human genome?

Facts to Remember!

? DNA is structured around the Complementary base pair rule:

A-T C-G

? Complementary: When two elements support or fit with each other

? When the two strands of DNA separate, each side of DNA serves as a template (model) to make a new complementary strand.

Steps of DNA Replication

1. DNA Unwinds and Unzips

? The double helix unwinds ? Weak hydrogen bonds between bases are

broken

DNA helicase= enzyme that unwinds and unzips DNA

? Complementary strands separate form a replication fork

Replication Fork looks like a fork in the road

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