Identify the structure of DNA
Identify the structure of RNA
Compare and contrast the structures of DNA
and RNA in terms of nucleotides and base
pairs.
South Carolina Standards:
B-4.1
B-4.2
B-3.5
DNA and RNA are two different nucleic
acids found in the cells of every living
organism.
DNA and RNA are composed of repeating
subunits called nucleotides. Nucleotides are
composed of three parts.
1. A phosphate group
2. A 5- carbon sugar
3. A nitrogen base
Nitrogen Base Pairs
DNA and RNA each have 4
nitrogen bases.
DNA
Adenine
Thymine
Cytosine
Guanine
RNA
Adenine
Uracil
Cytosine
Guanine
The difference in the base pairs for DNA and RNA are thymine in DNA
and Uracil in RNA. In DNA adenine pairs with thymine and cytosine
pairs with guanine. In RNA adenine pairs with uracil and cytosine pairs
with guanine
How do the nucleotides link together to form DNA ?
Click to watch the video
How Do nucleotides link together
to form RNA?
Click to watch video
RNA
Name
Function
5-Carbon Sugar
Shape
Backbone
Nitrogen Bases
Ribonucleic Acid
Messenger/In charge
of Protein Synthesis
Ribose
Single stranded
Repeating sugar
phosphate groups
Adenine +Uracil
Cytosine + Guanine
DNA
Deoxyribonucleic Acid
Genetic Make-up
Deoxyribose
Double Helix
Repeating sugar
phosphate groups
Adenine +Thymine
Cytosine + Guanine