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Milk contains approximately 4 . 9% carbohydrate that is mostly ____________________ with trace amounts of other sugars . Lactose is a ____________________ made up of glucose and galactose ____________________ together .
Before it can be used by the body , this bond must be ____________________ by the enzyme lactase in the small ____________________ . People that have decreased activity of lactase in the small intestine may have problems digesting lactose and this is referred to as lactose ____________________ or malabsorption .

Lactose is dissolved in the serum ( ____________________ ) phase of fluid milk .

The normal pasteurization conditions used for fluid milk have no significant effect on lactose . The higher temperatures used for ultra high temperature ( ____________________ ) pasteurization of extended shelf life products and spray ____________________ can cause ____________________ and isomerization reactions , which may affect product quality and nutritional properties . The browning reaction , called the ____________________ reaction , occurs between the lactose and protein in milk and produces ____________________ flavors and color , and ____________________ the available content of the amino acid lysine in milk protein .