WGU D440 Nutrition OA Exam Study Guide Questions 2026 U… 2026 Update • Verified Answers
✓ VERIFIED • 2026 UPDATE • 100% ACCURATE
WGU D440 Nutrition OA Exam Study Guide
Questions 2026 UPDATE
Actual Exam Questions & Verified Answers
with Detailed Rationales
Document Type: Exam (Elaborations)
Academic Year:
Total Questions: 50 Multiple Choice
Includes: Correct Answers + Full Rationales
Status: Verified & Updated for 2026
Exam (Elaborations) • Actual Questions & Rationales Page 1
,WGU D440 Nutrition OA Exam Study Guide Questions 2026 U… 2026 Update • Verified Answers
Questions & Verified Answers
1. How many kilocalories are provided by one gram of dietary fat?
A. 4 kcal/g
B. 7 kcal/g
C. 9 kcal/g
D. 12 kcal/g
Answer: C
Rationale: Dietary fat is the most energy-dense macronutrient, providing 9 kilocalories per gram, compared to
4 for carbohydrates and proteins. Recognizing this principle allows the nurse to prioritize care, anticipate
complications, and provide accurate patient education. Exam questions often test the ability to distinguish this
concept from closely related distractors, making a clear rationale essential for mastery.
2. Which vitamin is primarily synthesized in the skin upon exposure to ultraviolet (UV) light?
A. Vitamin A
B. Vitamin K
C. Vitamin E
D. Vitamin D
Answer: D
Rationale: Vitamin D is known as the ‘sunshine vitamin’ because the body can synthesize it when skin is
exposed to UVB rays. Exam questions often test the ability to distinguish this concept from closely related
distractors, making a clear rationale essential for mastery. Applying this knowledge in clinical settings supports
safe, evidence-based practice and improves patient outcomes.
3. According to the Dietary Guidelines for Americans, what is the recommended limit for added
sugars?
A. Less than 10% of total daily calories
B. Less than 5% of total daily calories
C. Less than 15% of total daily calories
D. Less than 20% of total daily calories
Answer: A
Rationale: The Dietary Guidelines for Americans recommend limiting added sugars to less than 10% of total
daily caloric intake to reduce the risk of chronic disease. This is an important clinical concept because selecting
the correct answer (A) requires understanding both the pathophysiology and the practical nursing implications.
Recognizing this principle allows the nurse to prioritize care, anticipate complications, and provide accurate
patient education.
Exam (Elaborations) • Actual Questions & Rationales Page 2
, WGU D440 Nutrition OA Exam Study Guide Questions 2026 U… 2026 Update • Verified Answers
4. A food label states a product is a ‘High Source’ of fiber. What percentage of the Daily Value
(DV) must it contain?
A. At least 20% DV
B. At least 10% DV
C. At least 15% DV
D. At least 5% DV
Answer: A
Rationale: A food is considered ‘high’ in a nutrient if it contains 20% or more of the Daily Value per serving.
Recognizing this principle allows the nurse to prioritize care, anticipate complications, and provide accurate
patient education. Exam questions often test the ability to distinguish this concept from closely related
distractors, making a clear rationale essential for mastery.
5. Which mineral is most closely associated with the prevention of neural tube defects during
pregnancy?
A. Iron
B. Calcium
C. Zinc
D. Folate (Folic Acid)
Answer: D
Rationale: Folate is essential for DNA synthesis and cell division; adequate intake before and during early
pregnancy significantly reduces the risk of neural tube defects. This is an important clinical concept because
selecting the correct answer (D) requires understanding both the pathophysiology and the practical nursing
implications.
6. What is the Body Mass Index (BMI) range classified as ‘Overweight’ for adults?
A. 18.5 to 24.9
B. 35.0 or higher
C. 30.0 to 34.9
D. 25.0 to 29.9
Answer: D
Rationale: BMI between 25.0 and 29.9 is categorized as overweight, while 18.5 to 24.9 is considered normal
weight. Applying this knowledge in clinical settings supports safe, evidence-based practice and improves
patient outcomes. This is an important clinical concept because selecting the correct answer (D) requires
understanding both the pathophysiology and the practical nursing implications.
Exam (Elaborations) • Actual Questions & Rationales Page 3
✓ VERIFIED • 2026 UPDATE • 100% ACCURATE
WGU D440 Nutrition OA Exam Study Guide
Questions 2026 UPDATE
Actual Exam Questions & Verified Answers
with Detailed Rationales
Document Type: Exam (Elaborations)
Academic Year:
Total Questions: 50 Multiple Choice
Includes: Correct Answers + Full Rationales
Status: Verified & Updated for 2026
Exam (Elaborations) • Actual Questions & Rationales Page 1
,WGU D440 Nutrition OA Exam Study Guide Questions 2026 U… 2026 Update • Verified Answers
Questions & Verified Answers
1. How many kilocalories are provided by one gram of dietary fat?
A. 4 kcal/g
B. 7 kcal/g
C. 9 kcal/g
D. 12 kcal/g
Answer: C
Rationale: Dietary fat is the most energy-dense macronutrient, providing 9 kilocalories per gram, compared to
4 for carbohydrates and proteins. Recognizing this principle allows the nurse to prioritize care, anticipate
complications, and provide accurate patient education. Exam questions often test the ability to distinguish this
concept from closely related distractors, making a clear rationale essential for mastery.
2. Which vitamin is primarily synthesized in the skin upon exposure to ultraviolet (UV) light?
A. Vitamin A
B. Vitamin K
C. Vitamin E
D. Vitamin D
Answer: D
Rationale: Vitamin D is known as the ‘sunshine vitamin’ because the body can synthesize it when skin is
exposed to UVB rays. Exam questions often test the ability to distinguish this concept from closely related
distractors, making a clear rationale essential for mastery. Applying this knowledge in clinical settings supports
safe, evidence-based practice and improves patient outcomes.
3. According to the Dietary Guidelines for Americans, what is the recommended limit for added
sugars?
A. Less than 10% of total daily calories
B. Less than 5% of total daily calories
C. Less than 15% of total daily calories
D. Less than 20% of total daily calories
Answer: A
Rationale: The Dietary Guidelines for Americans recommend limiting added sugars to less than 10% of total
daily caloric intake to reduce the risk of chronic disease. This is an important clinical concept because selecting
the correct answer (A) requires understanding both the pathophysiology and the practical nursing implications.
Recognizing this principle allows the nurse to prioritize care, anticipate complications, and provide accurate
patient education.
Exam (Elaborations) • Actual Questions & Rationales Page 2
, WGU D440 Nutrition OA Exam Study Guide Questions 2026 U… 2026 Update • Verified Answers
4. A food label states a product is a ‘High Source’ of fiber. What percentage of the Daily Value
(DV) must it contain?
A. At least 20% DV
B. At least 10% DV
C. At least 15% DV
D. At least 5% DV
Answer: A
Rationale: A food is considered ‘high’ in a nutrient if it contains 20% or more of the Daily Value per serving.
Recognizing this principle allows the nurse to prioritize care, anticipate complications, and provide accurate
patient education. Exam questions often test the ability to distinguish this concept from closely related
distractors, making a clear rationale essential for mastery.
5. Which mineral is most closely associated with the prevention of neural tube defects during
pregnancy?
A. Iron
B. Calcium
C. Zinc
D. Folate (Folic Acid)
Answer: D
Rationale: Folate is essential for DNA synthesis and cell division; adequate intake before and during early
pregnancy significantly reduces the risk of neural tube defects. This is an important clinical concept because
selecting the correct answer (D) requires understanding both the pathophysiology and the practical nursing
implications.
6. What is the Body Mass Index (BMI) range classified as ‘Overweight’ for adults?
A. 18.5 to 24.9
B. 35.0 or higher
C. 30.0 to 34.9
D. 25.0 to 29.9
Answer: D
Rationale: BMI between 25.0 and 29.9 is categorized as overweight, while 18.5 to 24.9 is considered normal
weight. Applying this knowledge in clinical settings supports safe, evidence-based practice and improves
patient outcomes. This is an important clinical concept because selecting the correct answer (D) requires
understanding both the pathophysiology and the practical nursing implications.
Exam (Elaborations) • Actual Questions & Rationales Page 3
