Protein Synthesis Part 1 pp

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Presentation transcript:

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

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)

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

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

Location Prokaryote: Cytoplasm Eukaryote: Nucleus

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

Transcription RNA Polymerase binds to DNA DNA unzips

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

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

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