1. Protein Synthesis

2. What are Proteins?
Chains of Amino Acids connected to one another by peptide bonds.
Have a specific shape and function.
Examples:
Enzymes
Hormones
Antibodies
Hemoglobin

3. Review Questions: 1) What are proteins
Review Questions: 1) What are proteins? 2) What are the differences between DNA and RNA?

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

5. Transcription
DNA  mRNA

6. Transcription DNA is converted to mRNA A U T  A C  G G  C
Occurs in the Nucleus
Template Strand: the strand of DNA that is used to code for the mRNA.

7. Free nucleotides combine to form an mRNA strand based on DNA’s code.
A codes for T codes for
C codes for G codes for

8. mRNA leaves the nucleus and travels to the ribosomes.

9. Simulation
opups/int_transcription.html

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

11. Translation
mRNA  Protein

12. Translation mRNA codes for protein Occurs in the ribosome
tRNA brings over amino acids that combine to from a protein based on mRNA’s code

13. 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?

14. Circle the Codons!

18. Resources… Video Simulation
Simulation
n.html