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Which of the following statement is incorrect regarding Yoghurt?

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in Biology – Class 12 by (271k points)
Which of the following statement is incorrect regarding Yoghurt?

(a) It is a fermented milk

(b) Mixed with an inoculum containing Streptococcus faecalis

(c) Preparation takes approximately 4-5 hours

(d) The original flavour of yoghurt is of acetaldehyde

This question was posed to me during a job interview.

The above asked question is from Microbes in Household Products-1 topic in portion Microbes in Human Welfare of Biology – Class 12

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Right option is (b) Mixed with an inoculum containing Streptococcus faecalis

For explanation I would say: Yoghurt is fermented milk. The milk is heated to 80-90°C for half an hour and then it is cooled to 40-43°C and mixed with an inoculum containing Streptococcus thermophilus and Lactobacillus bulgaricus. Preparation of yoghurt takes approximately 4-5 hours. The original flavour of yoghurt and other fermented kinds of milk is of acetaldehyde.

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