some pathogenetic bacteria express toxin genes found on 1)virulent (lytic phages) 2)enveloped viruses 3)viroids 4)filamentous 5)temperate phages...

some pathogenetic bacteria express toxin genes found on

1)virulent (lytic phages)

2)enveloped viruses

3)viroids

4)filamentous

5)temperate phages

Human and Giardia cells have many similarities. however, giardia infections can treated without significant toxicity to the host because Giardia cells

1) have peptidoglycan

2) lack mitochondria

3) lack ribosomes

4)they form cysts

5) are prokaryotic

the drug penicillin would not be effective in treating pneumonia caused by mycoplasma pneumoniae because

1)most people who develop this disease are allergic to penicillin

2) M.pneumoniae does not have peptidoglycan layer

3)