+1 vote
in Fermentation Technology by (72.1k points)
Which of the following is present in WLN media as a pH indicator?

(a) Phenolphthalein

(b) Methyl blue

(c) Methyl orange

(d) Bromocresol green

The question was asked in a job interview.

This question is from Microbiology in division Yeast Management & Microbiology of Fermentation Technology

1 Answer

+2 votes
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Best answer
Correct choice is (d) Bromocresol green

The best I can explain: Bromocresol green is the component of WLN media composition which is the only pH indicator. However, doubling the concentration of Bromocresol green has found the application in the differentiation of closely related brewing yeasts.

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