試題詳解

15. ________ are toxic proteins secreted by pathogenic bacteria, and ________ are toxic components of the outer membrane of gram-negative bacteria.
(A) Endotoxins； parasites
(B) Endotoxins； botulinum toxins
(C) Exotoxins； enterotoxins
(D) Exotoxins； endotoxins
(E) Endotoxins； enterotoxins