Download DNA Structure and Replication 2016.notebook

DNA Structure and Replication 2016.notebook
April 12, 2016
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DNA Structure and Replication 2016.notebook
April 12, 2016
DNA
• The instructions for life are in a code.
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DNA Structure and Replication 2016.notebook
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• The instructions for life are in a code.
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DNA Structure and Replication 2016.notebook
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Click on the nucleus to zoom in on
Organization and Packaging of DNA in the Cell
chromosomes. 4
DNA Structure and Replication 2016.notebook
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Nucleus
genes
chromosome
nitrogen bases
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DNA Structure and Replication 2016.notebook
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DNA Structure and Replication 2016.notebook
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sides
(steps)
sides
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DNA Structure and Replication 2016.notebook
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DNA Structure and Replication 2016.notebook
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DEOXYRIBOSE
c
c
c
c
c
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DNA Structure and Replication 2016.notebook
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PHOSPHATE GROUP
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DNA Structure and Replication 2016.notebook
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NITROGEN BASE (one of four)
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The DNA Ladder
• Phosphate and deoxyribose sugar form the sides of the ladder.
• Nitrogen bases form the steps (rungs) of the ladder.
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• There are four different nucleotides
because there are four different
kinds of nitrogen bases.
T
C
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How DNA Produces Traits
• DNA contains short segments called genes.
https://www.youtube.com/watch?v=FUA6_Ucw3i4
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• The sequence (arrangement) of the
nitrogen bases in the gene control
the production of a protein.
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Proteins control the
trait,or
characteristics of an
organism.
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Nucleus
genes
chromosome
nitrogen bases
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: making copies
of DNA
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Steps of DNA replication
1. Enzyme "unzips" the DNA molecule.
2. The strands separate and act as a "template" (model) for forming new strands.
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3. Free
nucleotides are
attached to the
two strands.
4. Two NEW
strands of DNA
are created.
5. Each is one
half original,
one half new.
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http://www.youtube.com/watch?v=FUA6_Ucw3i4
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