1. The heat of combustion for protein in 5.6 kcal/gram. What needs to be subtrac

Question

1. The heat of combustion for protein in 5.6 kcal/gram. What needs to be subtracted from the heat of combustion as measured from the bomb calorimeter?

a. the digestibility factor of the protein.

B. the heat generated from nitrogen in the sample, called the nitrogen factor.

C. the heat generated from the carbon in the sample.

d. A and B are true but not C.

E. A, B, and C are all true.

2. A piece of avocado is composed of 3 g of protein, 15 g of carbohydrate, and 25 g of fat. How many kcalories are in one avocado?

A. 105

B. 136

C. 238

D. 297

E. 336

3. Nutritionists refer to low and high energy density foods as they relate to satiation. Which of the following has the lowest energy density per gram of food.

A. peanuts

B. pretzels

C. cucumber

D. strawberry jam

4. Among the following, which would be most satiating during a meal given about the same kcalorie intake?

A. Pretzels

b. Apple

C. Pork chop

D. Piece of apple pie

E. salad with ranch dressing

5. Amanda is a 22 year old college student and rarely works out in the gym. What category below does she expend the most amount of energy?

A. Thermic effect of food

B. Basal metabolism

C. Physical activity

Explanation / Answer

1. Bomb calorimeter is used to determine the energy content of a food in kcal. The heat released when a food is burnt is referred to as heat of combustion. The factors which are substracted by the bomb calorimeter from the heat of combustion include the digestibility factor and nitrogen factor. This is because, it is not possible for the body to absorb and digest all the nutrients available and nitrogen bonds are not available to the body for generation of energy, so they are subtracted from proteins. Hence, the correct option is D.

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