dna - moodybiology.weebly.com€¦ · build a model of dna • the marshmallows are the bases...
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![Page 1: DNA - moodybiology.weebly.com€¦ · BUILD A MODEL OF DNA • The marshmallows are the bases (rungs) and the licorice is the sugars & phosphates. (sides) • Use this key –A =](https://reader033.vdocument.in/reader033/viewer/2022050201/5f551b543b6d1f4f9a67d72d/html5/thumbnails/1.jpg)
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DNAB. Model and label the basic structure of DNA
AKA
Deoxyribonucleic
Acid
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DNA Function
• The hereditary molecule
controlling the activities of the cell
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Found Where?
• NUCLEUS of the cell (DNA is in ALL
living organisms)
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Discovery of DNA
•WATSON and
CRICK
• In 1953
• At Cambridge
University in
England
A. Identify the scientists who discovered the DNA structure
![Page 6: DNA - moodybiology.weebly.com€¦ · BUILD A MODEL OF DNA • The marshmallows are the bases (rungs) and the licorice is the sugars & phosphates. (sides) • Use this key –A =](https://reader033.vdocument.in/reader033/viewer/2022050201/5f551b543b6d1f4f9a67d72d/html5/thumbnails/6.jpg)
DNA Structure
•What do you notice
about the structure
of DNA?
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NUCLEOTIDE
•The BUILDING block
of the DNA ladder
![Page 8: DNA - moodybiology.weebly.com€¦ · BUILD A MODEL OF DNA • The marshmallows are the bases (rungs) and the licorice is the sugars & phosphates. (sides) • Use this key –A =](https://reader033.vdocument.in/reader033/viewer/2022050201/5f551b543b6d1f4f9a67d72d/html5/thumbnails/8.jpg)
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NUCLEOTIDE
• Composed of
–PHOSPHATE
–DEOXYRIBOSE
SUGAR
–NITROGENOUS
BASE
Form the
sides of
“ladder”
Forms the
rungs of
“ladder”
![Page 10: DNA - moodybiology.weebly.com€¦ · BUILD A MODEL OF DNA • The marshmallows are the bases (rungs) and the licorice is the sugars & phosphates. (sides) • Use this key –A =](https://reader033.vdocument.in/reader033/viewer/2022050201/5f551b543b6d1f4f9a67d72d/html5/thumbnails/10.jpg)
Nitrogenous Bases
• There are 4 nitrogenous bases
–Adenine (A)
–Cytosine (C)
–Guanine (G)
–Thymine(T)
• 2 bases form the rungs
of the ladders
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Base Pair Rule
• A always pairs with T
• C always pairs with G
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Label
-Base
-Phosphate
-Deoxyribose
Sugar
Base Pair Rule
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• Strand
#1
– A -- ___
– C -- ___
– C -- ___
– G -- ___
– T -- ___
– A -- ___
– C -- ___
– T -- ___
– G -- ___
T
G
C
G
C
A
T
G
A
#2
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Sequence of bases:
• The order or sequences of bases
are what make different genes.
• Humans share 99.9% of the same
DNA sequences. (3.1 billion base
pairs)
• http://genetics.thetech.org/online-
exhibits/genes-common
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BUILD A MODEL OF DNA
• The marshmallows are the bases (rungs) and the
licorice is the sugars & phosphates. (sides)
• Use this key
– A = Orange C = Green
– T = Pink G = Yellow
• Make this sequence
– A C A T G G C A T
• GET YOUR MODEL CHECKED OFF BY MRS.
MOODY.