You are growing Bacillus subtilis in a bioreactor and notice that the growth rate has slowed and the pH has decreased. You suspect the bacteria are
A) photosynthesizing.
B) using proteins.
C) fermenting.
D) using the Krebs cycle.
E) dead.

Question

Quizplus · Accepted Answer

The decreased pH suggests acid production from fermentation, which is a common metabolic pathway for B. subtilis.

You Are Growing Bacillus Subtilis in a Bioreactor and Notice