Prortein Synthesis
- Created by: Elisha Smith
- Created on: 14-10-15 08:50
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- Protein Synthesis (Rebekah)
- Transcription
- DNA -> mRNA
- DNA Helicase
- Unwinds DNA molecule
- Free nucleotides align with exposed DNA bases
- Catalysed by RNA Polymerase
- mRNA is produced
- mRNA moves out of nucleus via nuclear pores.
- Not reusable to prevent over production of proteins
- DNA strand acts as a template
- In the Nucleus
- Activation
- tRNA + amino acid = tRNA-amino acid complex
- tRNA has an anticodon complemen-tary to codon on mRNA
- tRNA is clover shaped
- In the cytoplasm
- tRNA + amino acid = tRNA-amino acid complex
- Translation
- mRNA -> polynucleotide/protein
- In the cytoplasm
- Ribosome attaches to mRNA
- Large and small subunit
- At initiation codon on mRNA
- Anticodons on tRNA complementary to codons on mRNA
- tRNA binds to mRNA
- When 2 tRNA attach, the amino acids align
- Peptide bond forms between the amino acids
- tRNA detatches
- (Reusable)
- tRNA detatches
- Peptide bond forms between the amino acids
- Ribosome moves along 1 codon
- Transcription
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