4793673
Description
Flashcards by Charlotte Hewson, updated more than 1 year ago
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Created by Charlotte Hewson
over 8 years ago
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| Question | Answer |
| what is the first stage of synthesising a polypeptide? | ribosome attaches to start codon at end of mRNA molecule |
| 2nd? | tRNA with complementary anticodon sequence moves to ribosome and pairs with sequence on mRNA. this is carrying an amino acid |
| 3rd? | A tRNA molecule with complementary anticodon pairs with next codon on mRNA. this tRNA is carrying another amino acid. |
| 4th? | the ribosome moves along the mRNA bringing together two tRNA molecules at any one time, each pairing up with corresponding codon. |
| 5th? | using enzymes and ATP two amino acids on the tRNA are joined by peptide bonds |
| 6th? | ribosome moves along to next codon and so on, linking a chain of amino acids |
| 7th? | as this happens, the first tRNA is released and can go to collect another amino acid. |
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