Special Sub-Topic: Food for Thought
|Which is NOT a main component of food?|
Minerals. The four main food components are proteins, carbohydrates, water, and lipids.
|What food component contributes 9 calories per gram?|
Lipids. Carbohydrates contribute 4 calories per gram, as do sugars since they are carbohydrates, and water contributes 0 calories per gram.
|Which of the following contributes 0 calories per gram?|
Fiber. Fiber contributes 0 calories per gram because the body does not digest and absorb fiber. Carbohydrates and proteins both contribute 4 calories per gram, and lipids contribute 9 calories per gram.
|The two types of carbohydrates are organic and inorganic.|
f. Carbohydrates can either be complex or simple.
|Which disaccharide is composed of glucose and fructose?|
Sucrose. Lactose is composed of galactose and glucose, maltose is composed of glucose and glucose, as is trehalose(lactose and trehalose are isomers).
|What is the common name for sucrose?|
Sugar. Sucrose, or sugar, is a disaccharide composed of glucose and fructose.
|What enzyme is used to break down starches?|
Amylase. Amyl- means starch in Latin, and -ase means enzyme in Latin.
|In an iodine-solution test for starch, what color will a sample turn if starch is present?|
Black. If the test is negative, the sample is golden-brown.
|An unsaturated fat has double bonds.|
t. A polyunsaturated fat has multiple double bonds, and a monounsaturated fat has a single double bond. A saturated fat has the maximum number of hydrogen atoms it can hold, and has no double or triple bonds.
|Of the following sugars, which produces carbon dioxide gas the fastest when it reacts with yeast?|
Sucrose. Lactose produces no carbon dioxide, and sucrose produces the most.
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