Which of the following protein secretory systems injects effector molecules directly from the bacterial cytoplasm into the host cytoplasm?
A) type I
B) type II
C) type III
D) type IV
E) all of the above

Question

Quizplus · Accepted Answer

Only type III protein secretion system injects effector molecules directly from bacterial cytoplasm into the host cytoplasm. Type I and Type II secrete proteins across the bacterial membrane and periplasmic space and release them outside of the bacterial cell. Type IV secretion systems transfer DNA or protein directly from bacterial cells to a host cell, but not necessarily into the host cytoplasm.

Which of the Following Protein Secretory Systems Injects Effector Molecules