A microbe that grows only at the bottom of a tube of thioglycollate medium is probably a(n)
A) obligate anaerobe.
B) microaerophile.
C) obligate aerobe.
D) aerotolerant anaerobe.
E) facultative anaerobe.

Question

Quizplus · Accepted Answer

Thioglycollate medium is used to test the oxygen requirements of microorganisms. A microbe that grows only at the bottom of the tube is likely an obligate anaerobe, as this area has the least amount of oxygen.

A Microbe That Grows Only at the Bottom of a Tube