Final answer:
EF-G is a chaperone associated with the ribosome in E. coli that is responsible for translocating the ribosome during protein synthesis.
Step-by-step explanation:
In E. coli, a chaperone associated with the ribosome is called EF-G (elongation factor G).
EF-G is responsible for translocating the ribosome along the mRNA molecule during protein synthesis.
This movement of the ribosome allows for the reading and incorporation of the next codon and tRNA into the growing polypeptide chain.