WGU | D440
OBJECTIVE ASSESSMENT - EXAM
WGU D440 Nutrition Final Exam MCQ Testbank,
Questions & Answers (Verified Answers) With Expert
Rationales | 2026 - 2027 Update (PDF)
Certification Exam
100 100%
QUESTIONS VERIFIED ANSWERS EDITION
TOPICS COVERED
Macronutrients & Micronutrients Digestion & Absorption
Nutrition Across the Lifespan Medical Nutrition Therapy
Food Safety & Assessment Public Health Nutrition
COVER PAGE - 1
, SECTION 1 | Macronutrients and Micronutrients | Q1-Q20 | WGU D440 Nutrition Final Exam MCQ Testbank,
Questions & Answers (Verified Answers) With Expert Rationales | 2026 - 2027 Update (PDF) 2026/2027
Q1. Question 1 of 100
A patient presents with delayed wound healing and bleeding gums. The nurse suspects a
vitamin deficiency. Which vitamin is most likely deficient in this patient's diet?
A. Vitamin A
B. Vitamin B12
C. Vitamin C
D. Vitamin K
Correct Answer: C
Rationale:
Vitamin C (ascorbic acid) is essential for collagen synthesis. Deficiency leads to scurvy, characterized
by delayed wound healing, bleeding gums, and joint pain.
Q2. Question 2 of 100
A pregnant woman is advised to increase her intake of a specific vitamin to prevent neural
tube defects in the developing fetus. Which vitamin is she being advised to consume?
A. Folate (Vitamin B9)
B. Niacin (Vitamin B3)
C. Riboflavin (Vitamin B2)
D. Thiamine (Vitamin B1)
Correct Answer: A
Rationale:
Folate is critical for DNA synthesis and cell division. Adequate intake before and during early
pregnancy significantly reduces the risk of neural tube defects like spina bifida.
rition Final Exam MCQ Testbank, Questions & Answers (Verified Answers) With Expert Rationales | 2026 - 2027 Update (PDF) - 2026/2027 | Passing Scor
, Q3. Question 3 of 100
A patient following a strict vegan diet is at the highest risk for developing a deficiency in
which of the following micronutrients?
A. Vitamin C
B. Vitamin B12
C. Potassium
D. Magnesium
Correct Answer: B
Rationale:
Vitamin B12 is found almost exclusively in animal products. Individuals following a strict vegan diet
must consume fortified foods or supplements to prevent deficiency and subsequent megaloblastic
anemia.
Q4. Question 4 of 100
Which of the following macronutrients provides the most energy per gram?
A. Carbohydrates
B. Proteins
C. Fats (Lipids)
D. Alcohol
Correct Answer: C
Rationale:
Fats provide 9 kilocalories per gram, whereas carbohydrates and proteins provide 4 kilocalories per
gram. Alcohol provides 7 kcal/g, but it is not considered a required macronutrient.
rition Final Exam MCQ Testbank, Questions & Answers (Verified Answers) With Expert Rationales | 2026 - 2027 Update (PDF) - 2026/2027 | Passing Scor
, Q5. Question 5 of 100
A patient is admitted with severe dehydration. Which of the following best describes the
primary role of water in the body?
A. It provides energy for cellular metabolism.
B. It acts as a solvent and regulates body temperature.
C. It forms the structural basis of cell membranes.
D. It serves as a coenzyme in energy production.
Correct Answer: B
Rationale:
Water is essential for life, acting as a universal solvent, facilitating chemical reactions, transporting
nutrients, and regulating body temperature through sweating.
Q6. Question 6 of 100
Which essential trace mineral is a critical component of hemoglobin and myoglobin,
facilitating oxygen transport in the blood?
A. Zinc
B. Iron
C. Calcium
D. Iodine
Correct Answer: B
Rationale:
Iron is central to the structure of hemoglobin in red blood cells and myoglobin in muscle cells, allowing
them to bind and transport oxygen effectively throughout the body.
rition Final Exam MCQ Testbank, Questions & Answers (Verified Answers) With Expert Rationales | 2026 - 2027 Update (PDF) - 2026/2027 | Passing Scor
OBJECTIVE ASSESSMENT - EXAM
WGU D440 Nutrition Final Exam MCQ Testbank,
Questions & Answers (Verified Answers) With Expert
Rationales | 2026 - 2027 Update (PDF)
Certification Exam
100 100%
QUESTIONS VERIFIED ANSWERS EDITION
TOPICS COVERED
Macronutrients & Micronutrients Digestion & Absorption
Nutrition Across the Lifespan Medical Nutrition Therapy
Food Safety & Assessment Public Health Nutrition
COVER PAGE - 1
, SECTION 1 | Macronutrients and Micronutrients | Q1-Q20 | WGU D440 Nutrition Final Exam MCQ Testbank,
Questions & Answers (Verified Answers) With Expert Rationales | 2026 - 2027 Update (PDF) 2026/2027
Q1. Question 1 of 100
A patient presents with delayed wound healing and bleeding gums. The nurse suspects a
vitamin deficiency. Which vitamin is most likely deficient in this patient's diet?
A. Vitamin A
B. Vitamin B12
C. Vitamin C
D. Vitamin K
Correct Answer: C
Rationale:
Vitamin C (ascorbic acid) is essential for collagen synthesis. Deficiency leads to scurvy, characterized
by delayed wound healing, bleeding gums, and joint pain.
Q2. Question 2 of 100
A pregnant woman is advised to increase her intake of a specific vitamin to prevent neural
tube defects in the developing fetus. Which vitamin is she being advised to consume?
A. Folate (Vitamin B9)
B. Niacin (Vitamin B3)
C. Riboflavin (Vitamin B2)
D. Thiamine (Vitamin B1)
Correct Answer: A
Rationale:
Folate is critical for DNA synthesis and cell division. Adequate intake before and during early
pregnancy significantly reduces the risk of neural tube defects like spina bifida.
rition Final Exam MCQ Testbank, Questions & Answers (Verified Answers) With Expert Rationales | 2026 - 2027 Update (PDF) - 2026/2027 | Passing Scor
, Q3. Question 3 of 100
A patient following a strict vegan diet is at the highest risk for developing a deficiency in
which of the following micronutrients?
A. Vitamin C
B. Vitamin B12
C. Potassium
D. Magnesium
Correct Answer: B
Rationale:
Vitamin B12 is found almost exclusively in animal products. Individuals following a strict vegan diet
must consume fortified foods or supplements to prevent deficiency and subsequent megaloblastic
anemia.
Q4. Question 4 of 100
Which of the following macronutrients provides the most energy per gram?
A. Carbohydrates
B. Proteins
C. Fats (Lipids)
D. Alcohol
Correct Answer: C
Rationale:
Fats provide 9 kilocalories per gram, whereas carbohydrates and proteins provide 4 kilocalories per
gram. Alcohol provides 7 kcal/g, but it is not considered a required macronutrient.
rition Final Exam MCQ Testbank, Questions & Answers (Verified Answers) With Expert Rationales | 2026 - 2027 Update (PDF) - 2026/2027 | Passing Scor
, Q5. Question 5 of 100
A patient is admitted with severe dehydration. Which of the following best describes the
primary role of water in the body?
A. It provides energy for cellular metabolism.
B. It acts as a solvent and regulates body temperature.
C. It forms the structural basis of cell membranes.
D. It serves as a coenzyme in energy production.
Correct Answer: B
Rationale:
Water is essential for life, acting as a universal solvent, facilitating chemical reactions, transporting
nutrients, and regulating body temperature through sweating.
Q6. Question 6 of 100
Which essential trace mineral is a critical component of hemoglobin and myoglobin,
facilitating oxygen transport in the blood?
A. Zinc
B. Iron
C. Calcium
D. Iodine
Correct Answer: B
Rationale:
Iron is central to the structure of hemoglobin in red blood cells and myoglobin in muscle cells, allowing
them to bind and transport oxygen effectively throughout the body.
rition Final Exam MCQ Testbank, Questions & Answers (Verified Answers) With Expert Rationales | 2026 - 2027 Update (PDF) - 2026/2027 | Passing Scor
