Good question, Sean. Sorry it’s taken me so long to reply. It’s been a bit of a hectic day.
The correct tRNA will bind to the ribosome randomly- but as only the right tRNA will bind for the specific codon- that’s how it knows that it’s the right one, if that makes sense? Sorry it’s short but I’m in the middle of experiments- if you want more details or have more questions, feel free to ask! 😀