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daTALLsmurf2 daTALLsmurf2
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13 years ago
I need to know which type of yeast produces the best results, and whether it works better with glucose, or with fructose.
I have to answer this question for biology class, as to which would ferment the most and which sugar would do better.
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#1
13 years ago
Glucose would be better, unless you are making something with a fruit flavor.  Fructose has a fruit flavor to it, and so would be better suited to fruit flavored items, whereas glucose is plain, pure sugar and will work with anything.
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#2
13 years ago
Glucose would be a better option in regards to brewing industries.Yeast itself contains the enzyme maltase which converts maltose to glucose.
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#3
13 years ago
Fructose does not have a fruity flavour, it is slightly less sweet than glucose.  Fructose is closer the the ATP-generating step of the citric acid cycle, but glucose and fructose would likely be fairly equivalent.  Glucose is converted to glucose-6-phosphate and then to fructose-6-phosphate.  Maltose is converted to glucose so that it can follow that pathway.
By the way, glucose is not "plain sugar"..Table sugar is a double sugar made of a molecule of glucose and a molecule of fructose.
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#4
13 years ago
Right.  Glucose is a 6 carbon sugar, while fructose is a 5 carbon sugar.  Mole for mole, glucose is better as an energy substrate.  In real life, it's probably just about the same. Yeast can process a number of sugars, fructose is one of them.  The required enzyme i believe is fructose kinase or maybe phosphofructokinase. It's been a while since biochem.
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