1) Which of these is NOT a correct statement about pattern recognition receptors (PRRs)? Each PRR can only bind a specific type of microorganism. Toll-like receptors (TLRs) are a type of PRR. PRRs bind molecules from invading microorganisms and cause protective responses. PRRs are in the plasma membrane, endosome or phagosome, and cytoplasm of our body's cells. 2) Which of these is a correct statement about the complement system? Complement proteins... inhibit phagocytosis and inflammation. are in host cell membranes. get activated slowly, so it takes 10-14 days after microbial invasion for the complement system to start working. form a complex that directly kills microbes..