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DNA Structure and Replication 2016.notebook
April 21, 2017
Feb 26­4:09 PM
DNA
• The instructions for life are in a code.
Feb 26­4:10 PM
1
DNA Structure and Replication 2016.notebook
April 21, 2017
• The instructions for life are in a code.
Feb 26­4:10 PM
Click on the nucleus to zoom in on
Organization and Packaging of DNA in the Cell
chromosomes. Our Genome is Made of DNA Organization and packaging of DNA in the cell
2
DNA Structure and Replication 2016.notebook
April 21, 2017
Nucleus
genes
chromosome
nitrogen bases
Mar 11­2:59 PM
Mar 11­2:56 PM
3
DNA Structure and Replication 2016.notebook
April 21, 2017
Mar 11­2:58 PM
Mar 12­2:31 PM
4
DNA Structure and Replication 2016.notebook
April 21, 2017
Mar 10­1:45 PM
sides
(steps)
sides
Mar 12­2:28 PM
5
DNA Structure and Replication 2016.notebook
April 21, 2017
Mar 10­1:49 PM
Apr 21­10:15 AM
6
DNA Structure and Replication 2016.notebook
April 21, 2017
Mar 10­1:49 PM
Feb 26­4:19 PM
7
DNA Structure and Replication 2016.notebook
April 21, 2017
Feb 26­4:20 PM
DEOXYRIBOSE
c
c
c
c
c
Feb 26­4:20 PM
8
DNA Structure and Replication 2016.notebook
April 21, 2017
PHOSPHATE GROUP
Feb 26­4:21 PM
NITROGEN BASE (one of four)
Feb 26­4:21 PM
9
DNA Structure and Replication 2016.notebook
April 21, 2017
Feb 26­4:21 PM
Feb 26­4:21 PM
10
DNA Structure and Replication 2016.notebook
April 21, 2017
The DNA Ladder
• Phosphate and deoxyribose sugar form the sides of the ladder.
• Nitrogen bases form the steps (rungs) of the ladder.
Apr 13­1:06 PM
Feb 26­4:22 PM
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DNA Structure and Replication 2016.notebook
April 21, 2017
• There are four different nucleotides
because there are four different
kinds of nitrogen bases.
T
C
Apr 13­1:32 PM
Feb 26­4:23 PM
12
DNA Structure and Replication 2016.notebook
April 21, 2017
Feb 26­4:24 PM
Feb 26­4:25 PM
13
DNA Structure and Replication 2016.notebook
April 21, 2017
Feb 26­4:24 PM
How DNA Produces Traits
• DNA contains short segments called genes.
https://www.youtube.com/watch?v=FUA6_Ucw3i4
Apr 13­1:40 PM
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DNA Structure and Replication 2016.notebook
April 21, 2017
• The sequence (arrangement) of the
nitrogen bases in the gene control
the production of a protein.
Apr 13­1:45 PM
Proteins control the
trait,or
characteristics of an
organism.
Feb 26­4:26 PM
15
DNA Structure and Replication 2016.notebook
April 21, 2017
Nucleus
genes
chromosome
nitrogen bases
Mar 11­2:59 PM
: making copies
of DNA
Feb 26­4:27 PM
16
DNA Structure and Replication 2016.notebook
April 21, 2017
Steps of DNA replication
1. Enzyme "unzips" the DNA molecule.
2. The strands separate and act as a "template" (model) for forming new strands.
Feb 26­4:28 PM
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.
Feb 26­4:14 PM
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DNA Structure and Replication 2016.notebook
April 21, 2017
Feb 26­4:54 PM
Feb 26­4:56 PM
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DNA Structure and Replication 2016.notebook
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http://www.youtube.com/watch?v=FUA6_Ucw3i4
Feb 26­4:59 PM
Mar 14­10:06 AM
19
DNA Structure and Replication 2016.notebook
April 21, 2017
Mar 14­10:06 AM
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