1. Station 2
Protein Synethsis

2. Protein Synthesis Overview
DNA and more specifically genes are the code of instructions for making proteins.
Remember the sequence
DNA →RNA→Amino Acids→Proteins→Traits

3. Making Connections
Organisms and their common ancestor will share similar DNA
Since DNA codes for proteins, this means that they will also produce similar proteins.

4. The process from DNA to proteins
DNA has to be coded to mRNA
Using a codon chart, mRNA is then coded into a sequence of amino acids
The same sequence of amino acids= the same protein

5. Let’s practice!
DNA sequence: AATGCATAT
mRNA sequence would be what?

6. Let’s practice!
DNA sequence: AATGCATAT
mRNA sequence: UUACGUAUA

7. Let’s practice! DNA sequence: AATGCATAT mRNA sequence: UUACGUAUA
What would be the sequence of amino acids?

8. Let’s practice! sequence of amino acids: LEU ARG ILE
DNA sequence: AATGCATAT
mRNA sequence: UUA CGU AUA
sequence of amino acids:
LEU ARG ILE

9. Your turn!!
Directions: Using the DNA sequences of several organisms, determine common ancestry between organisms

10. Are any of the organisms below a possible common ancestor?
This is DNA taken from a mouse:  AAT AGC TCG TAG TAA CGT CAT TGA CCG TAA
Are any of the organisms below a possible common ancestor?
Organism 1: GAT TCA AGC TAA TAG CGT CAG TGA CCT TAT
Organism 2: GGA TCT TAG AGC TAA CGG CAG GCA TAG CCT
Organism 3: AAT AGC TAG TAG TAA CGT CAA TGA CCA TAA

11. Are any of the following organisms a possible ancestor?
This is the sequence of amino acids taken from human DNASER GLY ILE GLY VAL TYR GLY ALA VAL SER ILE ILE GLY
Are any of the following organisms a possible ancestor?
Organism 1: GGG TCA CCA CCG CGA ATT CCT CGG CAA TCG TAA GAA CCG
Organism 2: AGA CCG TAG CCA CAA ATA CCA CGA CAA TCG TAA TAG CCG
Organism 3: AAA AAG TAA TCT CAA ATG TCT CGT CAA TCA TAA TGA GGC