In prokaryotic transcription, - saonew

[ArchivalUser]

________ may bind to the mRNA strand as it is being transcribed.
sigma factors
DNA polymerase
ribosomes
single strand binding protein
tRNAs

[ArchivalUser]

ribosomes

[ArchivalUser]

you are right

Ribosomes often bind to an mRNA even before it has finished transcription, forming a grouping called polyribosomes.