Oxidative/fermentative (O/F) basal medium is a medium that will test the oxidative and fermentative capabilities of a microbe. The pH indicator is _____.
A) Sudan IV
B) phenolphthalein
C) bromocresol green
D) bromothymol blue

Question

Quizplus · Accepted Answer

Oxidative metabolism produces acids which will lower the pH of the medium. Fermentative metabolism produces acids and gas which will also lower the pH of the medium. The pH indicator bromothymol blue changes color from green to blue as the pH increases, making it the best choice for O/F basal medium.

Oxidative/fermentative (O/F) Basal Medium Is a Medium That Will Test