1. Protein Synthesis Part 1 pp. 204-206
Transcription
Protein Synthesis Part 1 pp

3. RNA vs. DNA
RNA and DNA both store genetic information, but are still different
RNA
DNA
Ribose
Deoxyribose
Uracil
Thymine
Single Stranded
Double Stranded
Short (can contain one gene)
Long (can contain thousands of genes)

4. Types of RNA mRNA (Messenger RNA)
Carries instructions to make a protein

5. Overview The first step to making proteins is called transcription
DNA  RNA  Protein

6. Location
Prokaryote: Cytoplasm
Eukaryote: Nucleus

7. Transcription DNA  RNA  Protein DNA is “rewritten” into mRNA
Only genes needed for specific proteins are transcribed

8. Transcription
RNA Polymerase binds to DNA
DNA unzips

9. Transcription RNA Polymerase adds complementary RNA Nucleotides
RNA has Uracil (U) instead of Thymine (T)
Guanine and Cytosine are the same

10. Transcription EXAMPLE: Polymerase falls off & DNA rebinds DNA Strand
A G T C G T C G A T C A
T C A G C A G C T A G T
mRNA Strand
A G U C G U C G A U C A

11. Result of Transcription
Produces a single strand of RNA
mRNA then carries “instructions” to ribosomes in the cytoplasm to make proteins