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check out this link:

http://www.madsci.org/posts/archives/2005-11/1132509463.Cb.r.html

what it basically says is that yeasts cannot use lactose becasue they cannot break it down into its components (galactose and glucose), so they can only use lactose when they are genetically engineered to produce lactase (an enzyme which breaks down lactose into its constituent sugars).

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15y ago

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Does yeast ferment lactose?

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