DNA Replication

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Information about DNA Replication
How-to & DIY

Published on March 5, 2014

Author: mgettenberg

Source: slideshare.net

8.3 DNA Replication KEY CONCEPT DNA replication copies the genetic information of a cell.

8.3 DNA Replication Replication copies the genetic information. • A single strand of DNA serves as a template for a new strand. • The rules of base pairing direct replication. • DNA is replicated during the S (synthesis) stage of the cell cycle. • Each body cell gets a complete set of identical DNA.

8.3 DNA Replication Proteins carry out the process of replication. • DNA serves only as a template. • Enzymes and other proteins do the actual work of replication. – Enzymes unzip the double helix. – Free-floating nucleotides form hydrogen bonds with the template strand. nucleotide The DNA molecule unzips in both directions.

8.3 DNA Replication – DNA polymerase enzymes bond the nucleotides together to form the double helix. – Polymerase enzymes form covalent bonds between nucleotides in the new strand. new strand nucleotide DNA polymerase

8.3 DNA Replication • Two new molecules of DNA are formed, each with an original strand and a newly formed strand. • DNA replication is semiconservative. original strand Two molecules of DNA new strand

8.3 DNA Replication Replication is fast and accurate. • DNA replication starts at many points in eukaryotic chromosomes. There are many origins of replication in eukaryotic chromosomes. • DNA polymerases can find and correct errors.

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