What is the function of the B segment of diphtheria toxin?
A) mimics aminoacyl-tRNA, thus causing premature termination of protein synthesis
B) cleaving tRNA
C) allowing the A fragment to enter the cell
D) covalent modification of elongation factor 2
E) None of the answers is correct.

Question

Quizplus · Accepted Answer

The B segment of diphtheria toxin facilitates the entry of the A fragment into the cell by binding to a receptor on the cell surface, thus allowing the toxic A fragment to enter the cell and exert its effects.

What Is the Function of the B Segment of Diphtheria