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Question

Which one of the following is not used in the production of yoghurt?

A
Streptococcus lactis
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B
Streptococcus thermopilus
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C
Lactobacillus bulgaricus
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D
Acetobacter aceti
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Solution

The correct option is D Acetobacter aceti
Yoghurt is produced through the fermentation of milk by lactic acid bacteria, usually Lactobacillus bulgarius and Streptococcus thermophilus. Acetobacter aceti bacteria are a widespread group of gram-negative, obligate aerobic rods which oxidize ethanol (alcohol) into ethanoic (acetic) acid.

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