1. Protein Synthesis

2. Review Questions: 1) What are proteins
Review Questions: 1) What are proteins? 2) What are the 3 types of RNA and their functions?

3. Protein Synthesis Overview
Proteins are required for the structure, function, and regulation of the body.
2 Step Process
Transcription
Translation
Codes

4. Transcription
DNA  mRNA

5. Step One: RNA Polymerase unwinds DNA
Template Strand: the strand of DNA that is used to code for the mRNA.
DNA unwinds

6. Step Two: Free nucleotides combine to form an mRNA strand.
A codes for T codes for
C codes for G codes for

7. Step Three: mRNA leaves the nucleus and travels to the ribosomes.

9. Simulation
opups/int_transcription.html

10. Transcription Practice…
DNA: ATC GCA AGC TAT
mRNA:
DNA: TAC TGG CGA ATC

11. What is a Codon? Every 3 letters of the mRNA strand is called a codon.
Each codon codes for a particular amino acid.
Question: How many different amino acids are there?
Question: What are amino acids?

12. Circle the Codons!

14. Translation
mRNA  Protein

16. Translation Step One: mRNA attaches to the ribosome and gets read.
Step Two: tRNA brings in the appropriate amino acid depending on the mRNA codon.
Step Three: Ribosomes form peptide bonds between amino acids.
Step Four: Polypeptide continues to grow until a stop codon is reached and the newly formed polypeptide chain is released from the ribosome.

19. Resources…