10. Dynamics of Microbial Growth

The optimum pH for an alkaliphile would be at:

A bacterium that thrives in your stomach is probably a(n):

The optimum pH of Acidithiobacillus bacteria (pH 3) is _______________ times more acid than blood (pH 7).

a. 4

b. 10

c. 100

d. 1000

e. 10,000

Superoxide dismutase _________.

a. causes hydrogen peroxide to become toxic

b. detoxifies superoxide radicals

c. neutralizes singlet oxygen

d. is missing in aerobes

Support or refute the following statement: Microbes cannot tolerate the low pH of the human stomach.