Protein Synthesis.

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DNA Transcription & Protein Translation

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Presentation transcript:

Protein Synthesis

Reminder- Transcription The DNA message has been changed into RNA 3 types of RNA mRNA tRNA rRNA

Part 2 of Gene Expression- Translation mRNA goes to ribosome Goal of translation The mRNA tells what order the amino acids should be in to make the protein

Translation The Code -Codon- 3 letters unit of mRNA -64 different codons but only 20 different AA

Translation b) Transfer RNA (tRNA) -Bring the AA to the ribosomes -at least 1 tRNA molecule for each of 20 AA -AA binds to one end of tRNA -Other end has anticodon which is complimentary to a specific codon of mRNA -tRNA-amino acid complex goes to ribosome and its anticodon pairs with mRNA codon

Translation c) Ribosomes & rRNA -ribosome has multiple binding sites -3 stages of translation: 1. Initiation 2. Elongation 3. Termination

Translation overview

Summary What you need to know: Why translation occurs Match the mRNA codon with an amino acid Ex) AUG = Methionine (Start codon) What is happening during the steps of Translation Initiation Elongation Termination