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Vinegar and Citric Acid

Vinegar and Citric Acid
What is the pH of the medium when molasses is used as substrate for the production of citric acid?

6
5
4
3

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Vinegar and Citric Acid
Malt vinegar is produced from

ethanol
malted grain
ale
fruit juices

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Vinegar and Citric Acid
Which of the following microorganism is used for the production of citric acid?

Lactobacillus bulgaricus
Streptococcus lactis
Aspergillus niger
Saccharomyces cerevisiae

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Vinegar and Citric Acid
In koji process for the fermentation to produce citric acid,

A. niger is used with solid substrate as sweet potato
both (a) and (b)
Fungal mycelium grows through out the solution in a deep tank
A. niger floats on the surface of solution

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Vinegar and Citric Acid
Which substrate is used in the fermentation of citric acid?

All of these
Sucrose
Beet molasses
Starch hydrolysate

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Vinegar and Citric Acid
Cider vinegar is produced from

fruit juices
malted grain
ale
ethanol

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