1. Protein Synthesis

2. Gene Expression
Protein- is a long string of amino acids that fold into various structures
Gene: segment of DNA that specifies the amino acid (AA) sequence of a protein

3. Gene Expression RNA- Ribonucleic Acid
-link between DNA & Protein synthesis
-single strand, single helix, Uracil not Thymine

4. Gene Expression 3 types:
1. Messenger (mRNA)- takes DNA message to ribosome
2. Ribosomal (rRNA)- make up ribosome (with proteins)
3. Transfer (tRNA)- brings AA to ribosomes

5. Gene Expression Gene Expression- production of a protein 2 steps:
1. Transcription- DNA copied into mRNA
2. Translation- mRNA directs the sequence of AA in a polypeptide

6. Transcription Transcription of mRNA
-RNA Polymerase binds tightly to Promoter
-Promoter is a region of DNA that contains
special sequence of nucleotides
-RNA Polymerase opens up DNA & joins
RNA nucleotides to DNA (complimentary)

7. Transcription Cont’d -Processing-
Add Guanine cap and poly-adenosine tail
Introns, segments of DNA with no gene
function, are cut out leaving only exons

8. Summary
What to know:
Relationship between DNA and genes and AA and proteins
DNA vs RNA
Steps of transcription
Processing steps