WGU D440 HESI Nutrition Objective Assessment Exam Prep 2026 UPDATE
1. Which of the following macronutrients provides 9 kilocalories per gram?
A. Fats
B. Proteins
C. Carbohydrates
D. Alcohol
Answer: A
Rationale: Fats are the most energy-dense macronutrient, providing 9 kcal/g, whereas
carbohydrates and proteins provide 4 kcal/g.
2. A patient with a BMI of 28.5 kg/m² would be classified into which weight category?
A. Underweight
B. Normal weight
C. Overweight
D. Obese
Answer: C
Rationale: BMI ranges are: Underweight (<18.5), Normal (18.5-24.9), Overweight (25-
29.9), and Obese (30 or greater).
,3. Which vitamin is essential for the absorption of calcium in the small intestine?
A. Vitamin A
B. Vitamin D
C. Vitamin E
D. Vitamin K
Answer: B
Rationale: Vitamin D functions as a hormone that increases the intestinal absorption of
calcium and phosphorus.
4. To prevent neural tube defects, women of childbearing age are encouraged to consume
adequate amounts of:
A. Iron
B. Vitamin B12
C. Folic acid
D. Vitamin C
Answer: C
Rationale: Folic acid (Vitamin B9) is crucial during early pregnancy to prevent neural tube
defects like spina bifida.
, 5. A nurse is teaching a patient about complete proteins. Which of the following is an
example of a complete protein source?
A. Lentils
B. Soybeans
C. Whole grain bread
D. Peanut butter
Answer: B
Rationale: Complete proteins contain all essential amino acids. While most plant sources
are incomplete, soy and animal products are complete.
6. What is the primary site for nutrient absorption in the human body?
A. Stomach
B. Small Intestine
C. Large Intestine
D. Esophagus
Answer: B
Rationale: The small intestine, specifically the jejunum and ileum, is where the majority of
nutrient absorption occurs due to its large surface area.
7. Which of the following is a water-soluble vitamin?
A. Vitamin C
1. Which of the following macronutrients provides 9 kilocalories per gram?
A. Fats
B. Proteins
C. Carbohydrates
D. Alcohol
Answer: A
Rationale: Fats are the most energy-dense macronutrient, providing 9 kcal/g, whereas
carbohydrates and proteins provide 4 kcal/g.
2. A patient with a BMI of 28.5 kg/m² would be classified into which weight category?
A. Underweight
B. Normal weight
C. Overweight
D. Obese
Answer: C
Rationale: BMI ranges are: Underweight (<18.5), Normal (18.5-24.9), Overweight (25-
29.9), and Obese (30 or greater).
,3. Which vitamin is essential for the absorption of calcium in the small intestine?
A. Vitamin A
B. Vitamin D
C. Vitamin E
D. Vitamin K
Answer: B
Rationale: Vitamin D functions as a hormone that increases the intestinal absorption of
calcium and phosphorus.
4. To prevent neural tube defects, women of childbearing age are encouraged to consume
adequate amounts of:
A. Iron
B. Vitamin B12
C. Folic acid
D. Vitamin C
Answer: C
Rationale: Folic acid (Vitamin B9) is crucial during early pregnancy to prevent neural tube
defects like spina bifida.
, 5. A nurse is teaching a patient about complete proteins. Which of the following is an
example of a complete protein source?
A. Lentils
B. Soybeans
C. Whole grain bread
D. Peanut butter
Answer: B
Rationale: Complete proteins contain all essential amino acids. While most plant sources
are incomplete, soy and animal products are complete.
6. What is the primary site for nutrient absorption in the human body?
A. Stomach
B. Small Intestine
C. Large Intestine
D. Esophagus
Answer: B
Rationale: The small intestine, specifically the jejunum and ileum, is where the majority of
nutrient absorption occurs due to its large surface area.
7. Which of the following is a water-soluble vitamin?
A. Vitamin C
