Which of the Following is NOT an Example of an AB

Question

Which of the following is NOT an example of an AB toxin?
A) shiga-like toxin
B) hemolysins
C) botulinum toxin
D) tetanus toxin

Accepted Answer

Hemolysins are not AB toxins. AB toxins consist of two components: the A component, which is toxic and the B component, which binds to specific receptors on host cells and delivers the A component inside the cell. Hemolysins are not composed of separate A and B components but instead act as cytolytic toxins by forming pores in host cell membranes. The other options listed are examples of AB toxins: shiga-like toxin, botulinum toxin, and tetanus toxin.