Q: A food label states that a serving contains 250 kcal, 10g fat, 30g carbohydrate, and 10g protein. Using the Atwater factors, calculate the percentage of calories from fat in this serving. (Use: Fat = 9 kcal/g, Carbohydrate = 4 kcal/g, Protein = 4 kcal/g)

$$\frac{10 \times 9}{250} \times 100 = 36\%$$

Question 1

Which of the following best describes the difference between an epidemiological study and a controlled trial in nutrition research?

Accepted Answer

An epidemiological study observes associations in populations without intervention, while a controlled trial manipulates variables to test cause and effect.

Question 2

A food label states that a serving contains 250 kcal, 10g fat, 30g carbohydrate, and 10g protein. Using the Atwater factors, calculate the percentage of calories from fat in this serving. (Use: Fat = 9 kcal/g, Carbohydrate = 4 kcal/g, Protein = 4 kcal/g)

Accepted Answer

$$\frac{10 	imes 9}{250} 	imes 100 = 36\%$$

Question 3

Which of the following statements about the Acceptable Macronutrient Distribution Range (AMDR) is correct?

Accepted Answer

AMDR defines the range of intake for each macronutrient associated with reduced risk of chronic disease while providing adequate nutrients.

Question 4

A patient is experiencing symptoms of scurvy, such as bleeding gums and poor wound healing. Which vitamin deficiency is most likely responsible, and what is a key function of this vitamin?

Accepted Answer

Vitamin C; required for collagen synthesis

Question 5

Which of the following best explains why trans fats are considered unhealthy?

Accepted Answer

They increase LDL cholesterol and decrease HDL cholesterol, raising heart disease risk.

Question 6

Which hormone is primarily responsible for reducing hunger, and where is it produced?

Accepted Answer

Leptin; produced in adipose tissue

Question 7

A person consumes a meal high in carbohydrates. Which hormone is released to lower blood glucose, and what is its primary action?

Accepted Answer

Insulin; promotes glucose uptake by cells

Question 8

Which of the following is a major function of water in the human body?

Accepted Answer

Regulates body temperature through evaporation and sweating

Question 9

Which of the following minerals is most important for the development of healthy bone tissue and prevention of osteoporosis?

Accepted Answer

Calcium

Question 10

A patient presents with night blindness and dry, scaly skin. Which vitamin deficiency is most likely, and what is a major food source of this vitamin?

Accepted Answer

Vitamin A; liver and orange vegetables

Question 11

Which of the following best describes the process of protein denaturation?

Accepted Answer

Unfolding of protein structure due to heat, acid, or agitation, without breaking peptide bonds

Question 12

Which of the following is a distinguishing feature of water-soluble vitamins compared to fat-soluble vitamins?

Accepted Answer

They are absorbed directly into the blood and excess is excreted in urine.

Question 13

A person is following a diet high in saturated fat and low in fiber. Which health risk is most increased by this dietary pattern?

Accepted Answer

Cardiovascular disease

Question 14

Which of the following best explains why dietary fiber is beneficial for health?

Accepted Answer

It promotes regular bowel movements and may lower blood cholesterol.

Question 15

Which of the following best describes the role of bile in fat digestion?

Accepted Answer

Bile emulsifies fats, increasing their surface area for enzyme action.

Question 16

A patient has a genetic disorder that prevents the absorption of vitamin B12. Which of the following symptoms is most likely to develop?

Accepted Answer

Pernicious anemia

Question 17

Which of the following best describes the difference between major and trace minerals?

Accepted Answer

Major minerals are required in amounts greater than 100 mg/day, while trace minerals are needed in smaller amounts.

Question 18

Which of the following is a primary function of vitamin D in the body?

Accepted Answer

Promotes calcium absorption in the intestine

Question 19

A person is experiencing muscle cramps and irregular heartbeat after excessive sweating during exercise. Which mineral is most likely depleted?

Accepted Answer

Sodium

Question 20

Which of the following best explains why vitamin K deficiency can lead to excessive bleeding?

Accepted Answer

Vitamin K is required for the synthesis of clotting factors in the liver.

Comprehensive Nutrition Study Guide: Key Concepts and Review

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