WGU D440 Nutrition OA Exam Prep 2026 UPDATE
1. Which of the following describes the Recommended Dietary Allowance (RDA)?
A. The average daily intake level sufficient to meet the nutrient requirements of nearly all
healthy individuals.
B. The average daily intake level estimated to meet the requirements of half of healthy
individuals.
C. The maximum amount of a nutrient unlikely to cause adverse health effects.
D. A recommended intake value based on observed or experimentally determined
approximations.
Answer: A
Rationale: The RDA is set to meet the needs of 97-98% of healthy individuals in a
particular life stage and gender group.
2. Which macronutrient provides 9 calories per gram?
A. Carbohydrates
B. Fats
C. Proteins
D. Alcohol
,Answer: B
Rationale: Fats are the most energy-dense macronutrient, providing 9 kcal/g compared to
4 kcal/g for carbs and proteins.
3. Which vitamin is primarily synthesized in the skin through exposure to ultraviolet (UV)
light?
A. Vitamin A
B. Vitamin D
C. Vitamin E
D. Vitamin K
Answer: B
Rationale: Vitamin D is known as the ‘sunshine vitamin’ because the body can produce it
when skin is exposed to sunlight.
4. Which of the following is a symptom of Vitamin C deficiency?
A. Night blindness
B. Scurvy
C. Osteomalacia
D. Beriberi
Answer: B
, Rationale: Scurvy is caused by a lack of Vitamin C, leading to bleeding gums and poor
wound healing.
5. What is the primary function of low-density lipoproteins (LDL)?
A. Breaking down triglycerides into fatty acids.
B. Removing cholesterol from the blood and returning it to the liver.
C. Transporting cholesterol from the liver to the body’s tissues.
D. Synthesizing bile salts in the gallbladder.
Answer: C
Rationale: LDL is often called ‘bad’ cholesterol because it carries cholesterol to the
peripheral tissues where it can contribute to plaque formation.
6. Which mineral is most closely associated with the regulation of fluid balance outside the
cells?
A. Potassium
B. Magnesium
C. Calcium
D. Sodium
Answer: D
Rationale: Sodium is the primary cation in extracellular fluid and is critical for maintaining
fluid balance and blood pressure.
1. Which of the following describes the Recommended Dietary Allowance (RDA)?
A. The average daily intake level sufficient to meet the nutrient requirements of nearly all
healthy individuals.
B. The average daily intake level estimated to meet the requirements of half of healthy
individuals.
C. The maximum amount of a nutrient unlikely to cause adverse health effects.
D. A recommended intake value based on observed or experimentally determined
approximations.
Answer: A
Rationale: The RDA is set to meet the needs of 97-98% of healthy individuals in a
particular life stage and gender group.
2. Which macronutrient provides 9 calories per gram?
A. Carbohydrates
B. Fats
C. Proteins
D. Alcohol
,Answer: B
Rationale: Fats are the most energy-dense macronutrient, providing 9 kcal/g compared to
4 kcal/g for carbs and proteins.
3. Which vitamin is primarily synthesized in the skin through exposure to ultraviolet (UV)
light?
A. Vitamin A
B. Vitamin D
C. Vitamin E
D. Vitamin K
Answer: B
Rationale: Vitamin D is known as the ‘sunshine vitamin’ because the body can produce it
when skin is exposed to sunlight.
4. Which of the following is a symptom of Vitamin C deficiency?
A. Night blindness
B. Scurvy
C. Osteomalacia
D. Beriberi
Answer: B
, Rationale: Scurvy is caused by a lack of Vitamin C, leading to bleeding gums and poor
wound healing.
5. What is the primary function of low-density lipoproteins (LDL)?
A. Breaking down triglycerides into fatty acids.
B. Removing cholesterol from the blood and returning it to the liver.
C. Transporting cholesterol from the liver to the body’s tissues.
D. Synthesizing bile salts in the gallbladder.
Answer: C
Rationale: LDL is often called ‘bad’ cholesterol because it carries cholesterol to the
peripheral tissues where it can contribute to plaque formation.
6. Which mineral is most closely associated with the regulation of fluid balance outside the
cells?
A. Potassium
B. Magnesium
C. Calcium
D. Sodium
Answer: D
Rationale: Sodium is the primary cation in extracellular fluid and is critical for maintaining
fluid balance and blood pressure.
