Which of the following statements about prokaryote ribosomes is false?:
a. They dissociate into 30S and 50S subunits when not translating mRNA
b.The major component is ribosomal RNA
c.They are enzymes which catalyse the formation of peptide bonds
d.They contain as much as 80% of the RNA in a cell
e. The large subunit binds to mRNA first