Which One of the Following Statements About Ribosomes Is True

Which one of the following statements about ribosomes is true?

A) The large subunit contains rRNA molecules;the small subunit does not.
B) The RNA in ribosomes plays a structural,not catalytic,role.
C) There are about 25 ribosomes in an E.coli cell.
D) There are two major ribosomal subunits,each with multiple proteins.
E) Ribosomes are relatively small,with molecular weights less than 10,000.