WGU D440 NUTRITION OA QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A | INSTANT
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1. Which nutrient is the body’s primary source of energy?
A. Protein
B. Fat
C. Carbohydrates
D. Vitamins
Carbohydrates are the preferred fuel for most body tissues.
2. Which vitamin is essential for calcium absorption?
A. Vitamin A
B. Vitamin D
C. Vitamin E
D. Vitamin K
Vitamin D enhances intestinal absorption of calcium.
3. A deficiency of which nutrient leads to goiter?
A. Zinc
B. Fluoride
C. Iron
D. Iodine
Iodine deficiency impairs thyroid hormone synthesis.
4. Which macronutrient provides 9 calories per gram?
A. Protein
, B. Carbohydrates
C. Fat
D. Alcohol
Fat provides the highest caloric density.
5. What is the primary function of protein?
A. Energy storage
B. Building and repairing tissues
C. Hormone production only
D. Enzyme inhibition
Protein supports structure, enzymes, hormones, and repair.
6. Which mineral is most important for oxygen transport?
A. Calcium
B. Iron
C. Sodium
D. Potassium
Iron is a component of hemoglobin.
7. Which vitamin deficiency leads to night blindness?
A. Vitamin A
B. Vitamin C
C. Vitamin D
D. Vitamin B12
Vitamin A maintains healthy vision.
8. Soluble fiber helps improve which health condition the most?
A. Osteoporosis
B. High cholesterol
C. Hypertension
, D. Kidney stones
Soluble fiber binds bile acids and reduces LDL.
9. Which nutrient is crucial for DNA synthesis?
A. Vitamin C
B. Vitamin E
C. Folate
D. Zinc
Folate is required for nucleic acid formation.
10. Which vitamin prevents scurvy?
A. Vitamin A
B. Vitamin E
C. Vitamin C
D. Vitamin K
Vitamin C is necessary for collagen synthesis.
11. A BMI of 30 indicates:
A. Underweight
B. Normal weight
C. Overweight
D. Obesity
BMI ≥30 is classified as obese.
12. Which food is the best source of omega-3 fatty acids?
A. Chicken breast
B. Salmon
C. Whole milk
D. Apples
Fatty fish are rich in EPA and DHA.
CORRECT ANSWERS (VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A | INSTANT
DOWNLOAD PDF
1. Which nutrient is the body’s primary source of energy?
A. Protein
B. Fat
C. Carbohydrates
D. Vitamins
Carbohydrates are the preferred fuel for most body tissues.
2. Which vitamin is essential for calcium absorption?
A. Vitamin A
B. Vitamin D
C. Vitamin E
D. Vitamin K
Vitamin D enhances intestinal absorption of calcium.
3. A deficiency of which nutrient leads to goiter?
A. Zinc
B. Fluoride
C. Iron
D. Iodine
Iodine deficiency impairs thyroid hormone synthesis.
4. Which macronutrient provides 9 calories per gram?
A. Protein
, B. Carbohydrates
C. Fat
D. Alcohol
Fat provides the highest caloric density.
5. What is the primary function of protein?
A. Energy storage
B. Building and repairing tissues
C. Hormone production only
D. Enzyme inhibition
Protein supports structure, enzymes, hormones, and repair.
6. Which mineral is most important for oxygen transport?
A. Calcium
B. Iron
C. Sodium
D. Potassium
Iron is a component of hemoglobin.
7. Which vitamin deficiency leads to night blindness?
A. Vitamin A
B. Vitamin C
C. Vitamin D
D. Vitamin B12
Vitamin A maintains healthy vision.
8. Soluble fiber helps improve which health condition the most?
A. Osteoporosis
B. High cholesterol
C. Hypertension
, D. Kidney stones
Soluble fiber binds bile acids and reduces LDL.
9. Which nutrient is crucial for DNA synthesis?
A. Vitamin C
B. Vitamin E
C. Folate
D. Zinc
Folate is required for nucleic acid formation.
10. Which vitamin prevents scurvy?
A. Vitamin A
B. Vitamin E
C. Vitamin C
D. Vitamin K
Vitamin C is necessary for collagen synthesis.
11. A BMI of 30 indicates:
A. Underweight
B. Normal weight
C. Overweight
D. Obesity
BMI ≥30 is classified as obese.
12. Which food is the best source of omega-3 fatty acids?
A. Chicken breast
B. Salmon
C. Whole milk
D. Apples
Fatty fish are rich in EPA and DHA.
