Lecture+08

Notethesuffix lactase osesugar h2o aseenzyme lactose

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Unformatted text preview: lactose). Lactose Intolerance: inability to digest significant amounts of lactose, due to a shortage of lactase, the enzyme that hydrolyzes (breaks down) lactose in the small intestine. Note the suffix: lactase “ose” sugar + H2O “ase” enzyme Lactose Glucose Galactose Honey main sugars: glucose and fructose (see table McGee p.6 66) 6 Bees collect sucrose‐containing nectar from flowers, and late r sucrose is broken down into glucose and fructose by the enzyme invertase: invertase Sucrose H2O Glucose + Fructose Maple syrup: 2/3 sugars and 1/3 water; main sugar is sucrose (see McGee p.668‐9) The word SUGAR is commonly used to mean common table sugar, or sucrose. Commercially, sugar is obtained worldwide from sugarcane and sugar beet (McGee p.670‐3; See raw sugar, white sugar, brown sugar). Brown sugar: sugar crystals with some residual molasses content, or produced by the addition of molasses to refined white sugar. Naturally moist, due to the hygroscopic nature of the molasses (McGee p.674‐6). Molasses from sugar cane ‐ various grades, such as first, second, “blackstrap molasses”; molasses contain substances other than simple sugars (McGee p.675‐6). Oligosaccharides (McGee p.803‐4) Pol...
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