Starting with mRNa in the cytoplasm, describe how translation leads to the production of a polypeptide ( without including transcription or slicing)

Once the mRNA is in the cytoplasm the smaller ribosomal subunit will connect to it. It will then slide in the 5' to 3' until it reaches the initialization codon ( AUG), once this happens the TRNA that carries the methionine aminoacid binds to the initialization codon. This is possible because the TRNA has a specific region caleed anticodon that recognizes the AUG cdon and binds with such by pairing.At this point the mrn is being contained bt both ribosomal subunitsand a second tRNA molecule connects too the following corresponding codon, a peptidic bond is then created between the aminoacids.As the ribosomes move ( 3 bases at a time) more tRNA molecules are being connected one at a time and being released once the peptidic bond is creted.When the ribosome reaches a finalization codon ( UAA , UAG or UGA) the proteic synthesis finishes, the last TRNA molecule leaves the ribosome which separates releasing the polypeptide, and so does the mRNA one which became available a new posterior translation.

Related Biology A Level answers

All answers ▸

Outline some of the evidence for evolution


Describe the role of calcium ions and ATP during muscle contraction


Outline the process of protein synthesis in a cell.


What is the structure of DNA?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2024

Terms & Conditions|Privacy Policy
Cookie Preferences