. Yeasts are single-celled micro-organisms which are also called as anaerobes, because


(a) they can survive only in presence of oxygen

(b) they can survive in absence of oxygen

(c) they can survive both in absence and presence of oxygen

(d) None of above

Best Answer

(b)

They can survive in absence of oxygen. Yeasts are called anaerobes because they can survive in absence of oxygen i.e. anaerobically. During this, they yield alcohol and large quantity of carbon-di-oxide through process of fermentation. This quality of yeasts, make them useful in Beer and Wine industry.

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