Protein Synthesis - Poudre School District
[Pages:32]Protein Synthesis
Making Proteins
Why Do We Need Proteins?
1. Cell Structure ? Cell = 80% protein
Cell membrane
Why Do We Need Proteins?
2. Cell Processes ? Hormones (signals)
? Enzymes (speed up reactions)
Why Do We Need Proteins?
?Membrane Channels (remember transport?)
?Neurotransmitters (carry nerve / brain messages)
What Do We Need For Protein Synthesis?
1.DNA
Template for making mRNA during Transcription
What Do We Need For Protein Synthesis?
2. RNA a. mRNA = messenger RNA
makes & takes copy of DNA to cytoplasm
b. tRNA = transfer RNA
Matches w/ mRNA on ribosome
Carries AA to add to protein chain ?s 1-7
What Do We Need For Protein Synthesis?
c. rRNA = ribosomal RNA
Part of ribosome
Reads mRNA
Directs tRNA
What Do We Need For Protein Synthesis?
3. Ribosome
Reads mRNA
Directs tRNA
Creates peptide bonds between AAs (makes polypeptide chain)
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