WGU D440 HEALTH AND WELLNESS THROUGH
NUTRITIONAL SCIENCE EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS) Q&A
2026/2027 |INSTANT DOWNLOAD PDF
1. Which macronutrient provides the body's primary source of
energy?
A. Protein
B. Vitamins
C. Carbohydrates
D. Minerals
Correct Answer: C. Carbohydrates
Rationale: Carbohydrates are the body's preferred and most
efficient source of energy, providing approximately 4 calories
per gram.
2. What is the main function of dietary protein?
A. Providing insulation
B. Building and repairing tissues
C. Regulating body temperature
D. Preventing dehydration
Correct Answer: B. Building and repairing tissues
Rationale: Proteins are essential for growth, tissue repair,
immune function, and production of enzymes and hormones.
,3. Which type of fat is generally associated with improved
heart health?
A. Trans fat
B. Saturated fat
C. Unsaturated fat
D. Industrial fat
Correct Answer: C. Unsaturated fat
Rationale: Unsaturated fats, including monounsaturated and
polyunsaturated fats, can help improve cholesterol levels when
replacing saturated and trans fats.
4. What is the primary purpose of fiber in the diet?
A. Increasing blood glucose rapidly
B. Supporting digestive health
C. Providing essential amino acids
D. Producing hormones
Correct Answer: B. Supporting digestive health
Rationale: Dietary fiber supports bowel regularity, helps
maintain healthy cholesterol levels, and contributes to satiety.
5. Which vitamin is essential for calcium absorption and bone
health?
,A. Vitamin C
B. Vitamin D
C. Vitamin K
D. Vitamin B12
Correct Answer: B. Vitamin D
Rationale: Vitamin D improves calcium absorption from the
intestine and supports strong bones.
6. A nutrient-dense food is one that:
A. Contains many calories with few nutrients
B. Provides many nutrients relative to calories
C. Contains only carbohydrates
D. Has no vitamins or minerals
Correct Answer: B. Provides many nutrients relative to calories
Rationale: Nutrient-dense foods provide vitamins, minerals,
fiber, and other beneficial nutrients without excessive calories.
7. Which mineral is most associated with oxygen transport in
the blood?
A. Calcium
B. Iron
C. Sodium
D. Potassium
, Correct Answer: B. Iron
Rationale: Iron is a key component of hemoglobin, which
carries oxygen in red blood cells.
8. The process of breaking food into smaller components the
body can absorb is called:
A. Metabolism
B. Digestion
C. Circulation
D. Respiration
Correct Answer: B. Digestion
Rationale: Digestion breaks food into nutrients that can be
absorbed and used by the body.
9. Where does most nutrient absorption occur?
A. Stomach
B. Large intestine
C. Small intestine
D. Mouth
Correct Answer: C. Small intestine
Rationale: The small intestine contains structures that
maximize absorption of nutrients into the bloodstream.
NUTRITIONAL SCIENCE EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS) Q&A
2026/2027 |INSTANT DOWNLOAD PDF
1. Which macronutrient provides the body's primary source of
energy?
A. Protein
B. Vitamins
C. Carbohydrates
D. Minerals
Correct Answer: C. Carbohydrates
Rationale: Carbohydrates are the body's preferred and most
efficient source of energy, providing approximately 4 calories
per gram.
2. What is the main function of dietary protein?
A. Providing insulation
B. Building and repairing tissues
C. Regulating body temperature
D. Preventing dehydration
Correct Answer: B. Building and repairing tissues
Rationale: Proteins are essential for growth, tissue repair,
immune function, and production of enzymes and hormones.
,3. Which type of fat is generally associated with improved
heart health?
A. Trans fat
B. Saturated fat
C. Unsaturated fat
D. Industrial fat
Correct Answer: C. Unsaturated fat
Rationale: Unsaturated fats, including monounsaturated and
polyunsaturated fats, can help improve cholesterol levels when
replacing saturated and trans fats.
4. What is the primary purpose of fiber in the diet?
A. Increasing blood glucose rapidly
B. Supporting digestive health
C. Providing essential amino acids
D. Producing hormones
Correct Answer: B. Supporting digestive health
Rationale: Dietary fiber supports bowel regularity, helps
maintain healthy cholesterol levels, and contributes to satiety.
5. Which vitamin is essential for calcium absorption and bone
health?
,A. Vitamin C
B. Vitamin D
C. Vitamin K
D. Vitamin B12
Correct Answer: B. Vitamin D
Rationale: Vitamin D improves calcium absorption from the
intestine and supports strong bones.
6. A nutrient-dense food is one that:
A. Contains many calories with few nutrients
B. Provides many nutrients relative to calories
C. Contains only carbohydrates
D. Has no vitamins or minerals
Correct Answer: B. Provides many nutrients relative to calories
Rationale: Nutrient-dense foods provide vitamins, minerals,
fiber, and other beneficial nutrients without excessive calories.
7. Which mineral is most associated with oxygen transport in
the blood?
A. Calcium
B. Iron
C. Sodium
D. Potassium
, Correct Answer: B. Iron
Rationale: Iron is a key component of hemoglobin, which
carries oxygen in red blood cells.
8. The process of breaking food into smaller components the
body can absorb is called:
A. Metabolism
B. Digestion
C. Circulation
D. Respiration
Correct Answer: B. Digestion
Rationale: Digestion breaks food into nutrients that can be
absorbed and used by the body.
9. Where does most nutrient absorption occur?
A. Stomach
B. Large intestine
C. Small intestine
D. Mouth
Correct Answer: C. Small intestine
Rationale: The small intestine contains structures that
maximize absorption of nutrients into the bloodstream.
