1. NUCLEIC ACIDS:

2. NUCLEIC ACIDS = DNA & RNA
Found in the nucleus of cells
Contains hereditary information
Chromosomes are made of DNA

3. NUCLEOTIDES!! Are the building blocks of DNA and RNA.
They are made up of:
Phosphate
base
sugar

4. NUCLEOTIDE CHAINS
DNA and RNA are made of many nucleotides joined together.
This is one nucleotide!

5. DNA CHAIN What nucleotides form the “backbone” of the chain?
Phosphates
Sugars

6. Sugar & Phosphate Backbone face inward in specific pairs
DOUBLE HELIX
Sugar & Phosphate Backbone =
On the outside
The bases
face inward in specific pairs
What do you notice about the base pairs?

7. DNA RNA Structure Sugar Bases Double Stranded “Double Helix”
Single Stranded
“Single Helix”
Sugar
Deoxyribose
Ribose
Bases
Adenine (A)
Guanine (G)
Cytosine (C)
Thymine (T)
Uracil (U)
Helix

8. DNA VS RNA
Which bases are ONLY in RNA?
Which bases are ONLY in DNA?

9. This is how bases ALWAYS pair in DNA:
BASE PAIRING
This is how bases ALWAYS pair in DNA:
A-T
G-C

10. A-U G-C BASE PAIRING Based on the way DNA pairs …
How do you think the bases ALWAYS pair in RNA?
A-U
G-C