All organisms make their proteins from:
the same twenty sugar molecules
the same twenty amino acids
different molecules, depending on the organism
none of these apply

Prokaryotic and eukaryotic cells are different in many ways other than the presence or absence of a nucleus. if both archaebacteria and eubacteria are prokaryotic cells, then why are archaebacteria more closely related to eukaryotic cells than they are to eubacteria?