BIOLOGY 11 – PRE-LAB EXERCISE Name: Answer Key 10 5 1. The “Calorie” on a food label is equivalent to what unit of energy? kcal How many Calories are in 1 gram of carbohydrate? 4 Calories per gram How many Calories are in 1 gram of fat? 9 Calories per gram How many Calories are in 1 gram of protein? 4 Calories per gram If peanut butter is about 25% protein / 60% oil / 15% sugar, how many Calories are in 1 tablespoon (= 16g) of peanut butter? [Round off to the nearest Calorie.] (16g PB x 25% protein x 4 kcal/g = 16 kcal from protein) + (16g PB x 60% lipid x 9 kcal/g = 86.4 kcal from fat) + (16g PB x 15% sugar x 4 kcal/g = 9.6 kcal from carbohydrates) = 16 + 86.4 + 9.6 = 112 kcal total 2. What are the three components of your daily energy requirement [expenditure]? basal metabolic rate; physical activity; specific dynamic action 3. One pound of body fat is equivalent to how many kcal? 3500 kcal So if you consume 200 more kcal per day than your body spends, how much weight would you gain in one month? 200 excess kcal per day x 30 days = 6,000 excess kcal per month
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This note was uploaded on 09/02/2011 for the course BIOL 11 taught by Professor Heyer during the Fall '08 term at UCSD.