1. What IS DNA anyway? But First, Do Now:
Find the table in your notes from two weeks ago. If you can’t find it, copy this one:
Macromolecule
Carbohydrate
Protein
Nucleic Acid
Lipid
Monomer
Monosaccharide
Amino acids
Monomer structure
5-6 atom ring, 1:2:1 ratio of C:H:O
Y – shape. 20 different types. 2 peptide bonds
Types
Mono-, di-, and poly- versions
Structural proteins (i.e. hair)& enzymes
Functions
Store energy, cellulose in plant cell walls
Many functions, i.e. digestion.

2. DNA’s Basic Structure isn’t Complex
Just like polysaccharides are long chains of…
And proteins are 1 or more long chains of …
Nucleic Acids are long chains of…
NUCLEOTIDES

3. Nucleotides: The Subunits of Nucleic Acids
A, C, G, T, U

4. DNA & RNA Are Made Up of Nucleotides

7. This model animation shows approximately 40 nucleotides arranged in a double helix (2-stranded spiral.)
DNA is a chemical that stores information.
It’s like a hard drive. Computers store information as 1s and 0s.
DNA and RNA store information as As, Ts, Gs, and Cs.
Just like an iPod stores your favorite songs, DNA stores your species favorite biological instructions.

8. DNA stores important information
RNA Processes and
transfers information

9. DNA & RNA: The 2 types of Nucleic Acids
Monomer
Nucleotides
# strands 2 1
Function
Store Information
Process Information

10. Macromolecule Analogy
An analogy demonstrates a relationship between 2 things.
Example: Cat is to fur as fish is to _____.
The correct answer is scales, because fur is on the outside of a cat, and scales are on the outside of a fish.
In an analogy, the relationship between the two words in each pair is the same

11. Macromolecules in Organisms are Like the Parts of a Computer
Complete the table by identifying the macromolecules and computer parts that have the same functions.
Function
Macromolecule
Computer
Provide Energy
Store Information
Process Information
Process things from input to output

12. Wrap Up: What are nucleic acids made of?
What element do nucleotides have that other monomers don’t
What do nucleic acids do?
What are the two types of nucleic acids?
Homework: Read p. 59 “Nucleic Acids”