some pathogenetic bacteria express toxin genes found on1)virulent (lytic phages)2)enveloped viruses3

some pathogenetic bacteria express toxin genes found on1)virulent (lytic phages)2)enveloped viruses3)viroids4)filamentous5)temperate phagesHuman and Giardia cells have many similarities. however, giardia infections can treated without significant toxicity to the host because Giardia cells1) have peptidoglycan2) lack mitochondria3) lack ribosomes4)they form cysts5) are prokaryoticthe drug penicillin would not be effective in treating pneumonia caused by mycoplasma pneumoniae because1)most people who develop this disease are allergic to penicillin2) M.pneumoniae does not have peptidoglycan layer 3)