Wake-up Draw and label a nucleotide.

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Presentation transcript:

Wake-up Draw and label a nucleotide. DNA is better known as a double helix (twisted ladder). What thing(s) make up the handles? What thing(s) make up the steps?

DNA Replication Christopherson

DNA: Deoxyribonucleic Acid

DNA: Location/Structure

Practice with Base Pairing: #1 Sugar and Phosphate A T C G G C T A C G A T T A G C C G A T G C T A Sugar and Phosphate

Practice with Base Pairing: #2 Sugar and Phosphate G G T C A T G C T A A A C C A G T A C G A T T T Sugar and Phosphate

DNA Replication: Purpose To make copies of DNA

Replication: Why? Growth/Make new cells

Replication: Why? Replace old cells

Human Skin

DNA Replication

Double Helix Phosphate Deoxyribose Nitrogen Base

Steps in DNA Replication #1 DNA Helicase (enzyme) attaches to DNA strand. Helicase unwinds DNA by breaking the hydrogen bonds holding together the bases

Helicase Helicase Double Helix Phosphate Deoxyribose Nitrogen Base

Steps in DNA Replication #2 DNA Polymerase (enzyme) attaches to exposed strands. It adds matching nucleotides. It also proofreads its work to make sure there is no mistakes.

DNA Polymerase DNA Backbone T A C G Nucleotide

Steps in DNA Replication #3 Old Old New New Produce 2 identical strands of DNA

DNA Replication Animation

DNA Replication: Complex Click ME

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