WGU D440 Nutrition Practice Exam 2026 UPDATE
1. Which of the following macronutrients is the body’s primary source of immediate energy?
A. Carbohydrates
B. Proteins
C. Lipids
D. Vitamins
Answer: A
Rationale: Carbohydrates are the body’s preferred and most efficient source of energy,
especially for the brain and nervous system.
2. What is the Recommended Dietary Allowance (RDA) for protein for a healthy adult?
A. 0.5 grams per kilogram of body weight
B. 1.2 grams per kilogram of body weight
C. 0.8 grams per kilogram of body weight
D. 2.0 grams per kilogram of body weight
Answer: C
Rationale: The RDA for protein for a sedentary adult is 0.8 grams per kilogram of body
weight to maintain nitrogen balance.
,3. Which vitamin is fat-soluble and plays a critical role in calcium absorption?
A. Vitamin C
B. Vitamin D
C. Vitamin B12
D. Vitamin K
Answer: B
Rationale: Vitamin D acts as a hormone to increase the absorption of calcium from the
intestines.
4. A patient is diagnosed with scurvy. Which nutrient deficiency is likely responsible?
A. Vitamin A
B. Thiamin
C. Iron
D. Vitamin C
Answer: D
Rationale: Scurvy is caused by a severe deficiency of Vitamin C, which is necessary for
collagen synthesis.
5. Which lipoprotein is commonly referred to as ‘good cholesterol’ because it removes excess
cholesterol from the blood?
A. LDL
, B. HDL
C. Chylomicrons
D. VLDL
Answer: B
Rationale: HDL (High-Density Lipoprotein) transports cholesterol away from body tissues
and back to the liver for excretion.
6. Which mineral is essential for the synthesis of thyroid hormones?
A. Zinc
B. Copper
C. Magnesium
D. Iodine
Answer: D
Rationale: Iodine is a key component of thyroid hormones T3 and T4, which regulate
metabolism.
7. What is the primary site of nutrient absorption in the human body?
A. Stomach
B. Large Intestine
C. Small Intestine
1. Which of the following macronutrients is the body’s primary source of immediate energy?
A. Carbohydrates
B. Proteins
C. Lipids
D. Vitamins
Answer: A
Rationale: Carbohydrates are the body’s preferred and most efficient source of energy,
especially for the brain and nervous system.
2. What is the Recommended Dietary Allowance (RDA) for protein for a healthy adult?
A. 0.5 grams per kilogram of body weight
B. 1.2 grams per kilogram of body weight
C. 0.8 grams per kilogram of body weight
D. 2.0 grams per kilogram of body weight
Answer: C
Rationale: The RDA for protein for a sedentary adult is 0.8 grams per kilogram of body
weight to maintain nitrogen balance.
,3. Which vitamin is fat-soluble and plays a critical role in calcium absorption?
A. Vitamin C
B. Vitamin D
C. Vitamin B12
D. Vitamin K
Answer: B
Rationale: Vitamin D acts as a hormone to increase the absorption of calcium from the
intestines.
4. A patient is diagnosed with scurvy. Which nutrient deficiency is likely responsible?
A. Vitamin A
B. Thiamin
C. Iron
D. Vitamin C
Answer: D
Rationale: Scurvy is caused by a severe deficiency of Vitamin C, which is necessary for
collagen synthesis.
5. Which lipoprotein is commonly referred to as ‘good cholesterol’ because it removes excess
cholesterol from the blood?
A. LDL
, B. HDL
C. Chylomicrons
D. VLDL
Answer: B
Rationale: HDL (High-Density Lipoprotein) transports cholesterol away from body tissues
and back to the liver for excretion.
6. Which mineral is essential for the synthesis of thyroid hormones?
A. Zinc
B. Copper
C. Magnesium
D. Iodine
Answer: D
Rationale: Iodine is a key component of thyroid hormones T3 and T4, which regulate
metabolism.
7. What is the primary site of nutrient absorption in the human body?
A. Stomach
B. Large Intestine
C. Small Intestine
