Normal microbiota provide protection from infection in each of the following ways EXCEPT
A) they compete with pathogens for nutrients.
B) they produce lysozyme.
C) they make the chemical environment unsuitable for nonresident bacteria.
D) they produce antibacterial chemicals.
E) they change the pH of the environment.

Question

Quizplus · Accepted Answer

Normal microbiota do not produce lysozyme. Lysozyme is an antibacterial enzyme found in tears, saliva, and mucus that helps protect against bacterial infections. However, normal microbiota do compete with pathogens for nutrients, produce antibacterial chemicals, make the environment unsuitable for nonresident bacteria, and can change the pH of the environment.

Normal Microbiota Provide Protection from Infection in Each of the Following