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Ale strains of Saccharomyces cerevisiae cannot easily ferment ______________

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Ale strains of Saccharomyces cerevisiae cannot easily ferment ______________

(a) Fructose

(b) Trehalose

(c) Sucrose

(d) Raffinose

This question was addressed to me by my school teacher while I was bunking the class.

This interesting question is from Fermentation Biochemistry topic in section The Biochemistry of Fermentation of Fermentation Technology

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Right answer is (b) Trehalose

The best explanation: Ale strains of Saccharomyces cerevisiae can ferment glucose, fructose, maltose, sucrose, galactose, raffinose, maltotriose. They cannot ferment trehalose easily. Lager strains of Saccharomyces cerevisiae are also able to ferment melibiose. Therefore, there is some variability between individual strains.

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