Ribosomes are composed of . . . . . . .

Prokaryotic ribosomes are $70S$,where '$S$' stands for:

The larger subunit in $80S$ ribosome is (in $S$)

In which part of the cell does protein synthesis occur?

Identify the relationship in the following analogy:
Eukaryotic ribosomes : $80S$ :: Prokaryotic ribosomes : ............ (in $S$)

The component present in the highest amount in a ribosome is .......