Q. How many of the same proteins are made at the same time by each ribosome in the translation of one mRNA molecule? How does successive protein production occur in translation?
Ribosomes do not make numerous different proteins simultaneously. They make them one later than another.
Along one single mRNA molecule however many ribosomes may move in a real mass manufacturing of the same protein, the unit made of many ribosomes working upon the same mRNA molecule is called polysome.