alleryWhich yeast is used to ferment cereals and fruit juices to produce ethanol (also used for bread-making)?
ASaccharomyces cerevisiae
BRhizopus oryzae
CNeurospora
DAspergillus niger
Answer & Solution
Correct answer: A. Saccharomyces cerevisiae
1. Saccharomyces cerevisiae is used both as baker's yeast and brewer's yeast.
2. It ferments sugars in malted cereals and fruit juices to yield ethanol.
3. Wine and beer are produced without distillation; whisky, brandy, rum with distillation.
4. Rhizopus and Aspergillus are used for other products (organic acids), not primarily beverages.
_Source: syllabus Biology, Ch 8 "Microbes in Human Welfare", §8.2.1_
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