Which one of the following statements about the nature of diphtheria toxin is FALSE?
a. Inhibits protein synthesis in target cells
b. Is a slow acting, heat labile, diffusible protein exotoxin
c. Production greatly influenced by iron concentration
d. Toxigenic cells are invariably lysogenic
e. Toxoid is derived from avirulent strains.

Aadya_Singhania Answered question August 2, 2022