Q: A food contains 10 grams of carbohydrate, 5 grams of protein, and 8 grams of fat. Using the standard Atwater factors, what is the total calorie content of this food?

$$10 \times 4 + 5 \times 4 + 8 \times 9 = 112$$ calories

Q: A nutrition label states that a serving contains 200 calories, with 9 grams of fat. What percent of calories in this serving come from fat? (Use $$1 \text{ gram fat} = 9 \text{ kcal})$$

$$\frac{9 \times 9}{200} \times 100 = 40.5\%$$

Q: A food label lists the following per serving: 8g fat, 24g carbohydrate, 4g protein. What percent of calories come from protein? (Use $$1 \text{g protein} = 4 \text{kcal})$$

$$\frac{4 \times 4}{(8 \times 9) + (24 \times 4) + (4 \times 4)} \times 100 = 8.2\%$$

Question 1

A food contains 10 grams of carbohydrate, 5 grams of protein, and 8 grams of fat. Using the standard Atwater factors, what is the total calorie content of this food?

Accepted Answer

$$10 	imes 4 + 5 	imes 4 + 8 	imes 9 = 112$$ calories

Question 2

Which of the following best describes the difference between nutrient density and energy density?

Accepted Answer

Nutrient density refers to foods high in nutrients but low in calories, while energy density refers to foods high in calories but low in weight or volume.

Question 3

A nutrition label states that a serving contains 200 calories, with 9 grams of fat. What percent of calories in this serving come from fat? (Use $$1 	ext{ gram fat} = 9 	ext{ kcal})$$

Accepted Answer

$$\frac{9 	imes 9}{200} 	imes 100 = 40.5\%$$

Question 4

Which of the following is NOT a component of the Dietary Reference Intakes (DRIs)?

Accepted Answer

Basal Metabolic Rate (BMR)

Question 5

A 35-year-old woman has a BMI of 32 kg/m$$^2$$ and a waist circumference of 38 inches. According to current guidelines, how would her weight status and health risk be classified?

Accepted Answer

Obese; increased risk for chronic diseases due to high waist circumference

Question 6

Which of the following statements about the Acceptable Macronutrient Distribution Ranges (AMDRs) is correct?

Accepted Answer

The AMDR for carbohydrates is 45–65% of total calories.

Question 7

Which of the following is a key difference between the Recommended Dietary Allowance (RDA) and Adequate Intake (AI)?

Accepted Answer

RDA is based on strong scientific evidence, while AI is used when evidence is insufficient to establish an RDA.

Question 8

Which of the following best describes the role of protein during physical activity?

Accepted Answer

Protein primarily supports muscle repair and growth rather than serving as a major energy source.

Question 9

A runner is preparing for a marathon and wants to maximize glycogen stores. Which dietary strategy is most appropriate?

Accepted Answer

Carbohydrate loading several days before the event

Question 10

Which of the following is a characteristic of central obesity?

Accepted Answer

Excess visceral fat stored around the abdomen

Question 11

Which hormone is most directly involved in promoting satiety after a meal?

Accepted Answer

Leptin

Question 12

A food label lists the following per serving: 8g fat, 24g carbohydrate, 4g protein. What percent of calories come from protein? (Use $$1 	ext{g protein} = 4 	ext{kcal})$$

Accepted Answer

$$\frac{4 	imes 4}{(8 	imes 9) + (24 	imes 4) + (4 	imes 4)} 	imes 100 = 8.2\%$$

Question 13

Which of the following is NOT a required component on a Nutrition Facts panel?

Accepted Answer

Percent of calories from sugar

Question 14

Which of the following is a recommended strategy for safe and long-term weight loss?

Accepted Answer

Aim to lose 0.5 to 2 pounds per week through a combination of diet and physical activity

Question 15

Which of the following best describes the role of antioxidants in physical fitness?

Accepted Answer

They help protect cells from oxidative damage caused by intense exercise.

Question 16

Which of the following is a sign of hyponatremia during prolonged exercise?

Accepted Answer

Low blood sodium levels due to excessive water intake

Question 17

Which ergogenic aid is correctly matched with its primary effect?

Accepted Answer

Creatine: enhances short-term, high-intensity performance

Question 18

Which of the following is a key principle of a healthy diet according to the Dietary Guidelines for Americans?

Accepted Answer

Balance, variety, and moderation

Question 19

Which of the following best describes the scientific method as it applies to nutrition research?

Accepted Answer

A systematic process involving observation, hypothesis formation, experimentation, and conclusion

Question 20

Which of the following is the most appropriate recommendation for fluid intake during prolonged exercise lasting more than one hour?

Accepted Answer

Consume a sports drink containing electrolytes and carbohydrates

Study Guide: Key Concepts in Nutrition (Chapters 1, 2, 10, 11)

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