WGU D440 NUTRITION OA EXAM | QUESTIONS AND
ANSWERS (VERIFIED ANSWERS) | EXAM PREP PRACTICE
QUESTIONS AND ANSWERS | LATEST EXAM GUIDE 2026&2027
1. Which nutrient provides the greatest amount of energy per gram?
A. Carbohydrate
B. Protein
C. Fat
D. Water
Answer: C
Fat provides approximately 9 kcal per gram, whereas carbohydrate and protein provide
approximately 4 kcal per gram.
2. A client wants to increase dietary fiber. Which food would be the best recommendation?
A. White rice
B. Lentils
C. Chicken breast
D. Cheddar cheese
Answer: B
Lentils are rich in dietary fiber and also provide plant-based protein, making them an effective
choice for increasing fiber intake.
3. Which nutrient is the body's primary preferred source of energy during normal daily
activity?
A. Carbohydrate
B. Vitamin C
C. Protein
D. Calcium
Answer: A
Carbohydrates are readily converted to glucose, which serves as the body's preferred
immediate energy source.
4. Which statement best describes a complete protein?
A. It contains only plant-derived amino acids.
B. It contains all nine essential amino acids in adequate amounts.
C. It contains no saturated fat.
D. It provides more calories than carbohydrates.
,Answer: B
A complete protein supplies all nine essential amino acids in amounts sufficient to support
normal physiological needs.
5. A client reports fatigue and weakness and consumes very little meat or other iron-rich
food. Which deficiency should be considered?
A. Vitamin D deficiency
B. Calcium deficiency
C. Iron deficiency
D. Vitamin K deficiency
Answer: C
Inadequate iron intake can impair hemoglobin production and contribute to iron-deficiency
anemia, fatigue, and weakness.
6. Which food is the best source of vitamin C?
A. Orange
B. Brown rice
C. Salmon
D. Egg
Answer: A
Citrus fruits such as oranges provide substantial amounts of vitamin C, which supports
collagen formation and immune function.
7. What is the primary role of dietary fiber in the gastrointestinal tract?
A. Increasing blood cholesterol
B. Supporting normal bowel function
C. Providing 9 kcal per gram
D. Increasing sodium absorption
Answer: B
Dietary fiber promotes healthy gastrointestinal function by adding bulk, supporting bowel
regularity, and influencing intestinal microbiota.
8. Which nutrient is essential for calcium absorption and bone health?
A. Vitamin B12
B. Vitamin C
C. Vitamin D
D. Vitamin K only
Answer: C
,Vitamin D enhances intestinal calcium absorption and plays an important role in maintaining
healthy bones.
9. A student regularly consumes sugary beverages instead of water. Which health concern
is most directly associated with excessive added-sugar intake?
A. Reduced energy density
B. Increased risk of excessive calorie intake
C. Increased dietary fiber
D. Improved blood glucose control
Answer: B
Sugar-sweetened beverages can provide substantial calories without producing the same
satiety as many nutrient-dense foods.
10. Which mineral is most directly involved in maintaining normal fluid balance and nerve
transmission?
A. Sodium
B. Iron
C. Zinc
D. Iodine
Answer: A
Sodium contributes to extracellular fluid balance and is essential for nerve impulses and
muscle contraction.
11. Which macronutrient is composed of amino acids?
A. Fat
B. Protein
C. Carbohydrate
D. Fiber
Answer: B
Proteins are polymers composed of amino acids linked by peptide bonds.
12. Which food provides primarily unsaturated fat?
A. Olive oil
B. Butter
C. Lard
D. Processed shortening
Answer: A
, Olive oil is rich in monounsaturated fatty acids and is generally considered a heart-healthier
fat choice.
13. Which vitamin is fat-soluble?
A. Vitamin C
B. Vitamin B1
C. Vitamin B12
D. Vitamin A
Answer: D
Vitamins A, D, E, and K are fat-soluble and can be stored in body tissues.
14. Why are water-soluble vitamins generally less likely than fat-soluble vitamins to
accumulate to toxic levels?
A. They cannot enter cells.
B. Excess amounts are commonly excreted in urine.
C. They provide no physiological function.
D. They are stored permanently in adipose tissue.
Answer: B
Many excess water-soluble vitamins are eliminated through urine, although toxicity can still
occur with excessive supplementation of certain vitamins.
15. Which vitamin is particularly important for normal blood clotting?
A. Vitamin K
B. Vitamin C
C. Vitamin B6
D. Vitamin B1
Answer: A
Vitamin K is required for synthesis of several proteins involved in normal blood coagulation.
16. Which food is a good dietary source of calcium?
A. Apples
B. Milk
C. Olive oil
D. White sugar
Answer: B
Milk provides highly bioavailable calcium and is a common dietary source of this mineral.
ANSWERS (VERIFIED ANSWERS) | EXAM PREP PRACTICE
QUESTIONS AND ANSWERS | LATEST EXAM GUIDE 2026&2027
1. Which nutrient provides the greatest amount of energy per gram?
A. Carbohydrate
B. Protein
C. Fat
D. Water
Answer: C
Fat provides approximately 9 kcal per gram, whereas carbohydrate and protein provide
approximately 4 kcal per gram.
2. A client wants to increase dietary fiber. Which food would be the best recommendation?
A. White rice
B. Lentils
C. Chicken breast
D. Cheddar cheese
Answer: B
Lentils are rich in dietary fiber and also provide plant-based protein, making them an effective
choice for increasing fiber intake.
3. Which nutrient is the body's primary preferred source of energy during normal daily
activity?
A. Carbohydrate
B. Vitamin C
C. Protein
D. Calcium
Answer: A
Carbohydrates are readily converted to glucose, which serves as the body's preferred
immediate energy source.
4. Which statement best describes a complete protein?
A. It contains only plant-derived amino acids.
B. It contains all nine essential amino acids in adequate amounts.
C. It contains no saturated fat.
D. It provides more calories than carbohydrates.
,Answer: B
A complete protein supplies all nine essential amino acids in amounts sufficient to support
normal physiological needs.
5. A client reports fatigue and weakness and consumes very little meat or other iron-rich
food. Which deficiency should be considered?
A. Vitamin D deficiency
B. Calcium deficiency
C. Iron deficiency
D. Vitamin K deficiency
Answer: C
Inadequate iron intake can impair hemoglobin production and contribute to iron-deficiency
anemia, fatigue, and weakness.
6. Which food is the best source of vitamin C?
A. Orange
B. Brown rice
C. Salmon
D. Egg
Answer: A
Citrus fruits such as oranges provide substantial amounts of vitamin C, which supports
collagen formation and immune function.
7. What is the primary role of dietary fiber in the gastrointestinal tract?
A. Increasing blood cholesterol
B. Supporting normal bowel function
C. Providing 9 kcal per gram
D. Increasing sodium absorption
Answer: B
Dietary fiber promotes healthy gastrointestinal function by adding bulk, supporting bowel
regularity, and influencing intestinal microbiota.
8. Which nutrient is essential for calcium absorption and bone health?
A. Vitamin B12
B. Vitamin C
C. Vitamin D
D. Vitamin K only
Answer: C
,Vitamin D enhances intestinal calcium absorption and plays an important role in maintaining
healthy bones.
9. A student regularly consumes sugary beverages instead of water. Which health concern
is most directly associated with excessive added-sugar intake?
A. Reduced energy density
B. Increased risk of excessive calorie intake
C. Increased dietary fiber
D. Improved blood glucose control
Answer: B
Sugar-sweetened beverages can provide substantial calories without producing the same
satiety as many nutrient-dense foods.
10. Which mineral is most directly involved in maintaining normal fluid balance and nerve
transmission?
A. Sodium
B. Iron
C. Zinc
D. Iodine
Answer: A
Sodium contributes to extracellular fluid balance and is essential for nerve impulses and
muscle contraction.
11. Which macronutrient is composed of amino acids?
A. Fat
B. Protein
C. Carbohydrate
D. Fiber
Answer: B
Proteins are polymers composed of amino acids linked by peptide bonds.
12. Which food provides primarily unsaturated fat?
A. Olive oil
B. Butter
C. Lard
D. Processed shortening
Answer: A
, Olive oil is rich in monounsaturated fatty acids and is generally considered a heart-healthier
fat choice.
13. Which vitamin is fat-soluble?
A. Vitamin C
B. Vitamin B1
C. Vitamin B12
D. Vitamin A
Answer: D
Vitamins A, D, E, and K are fat-soluble and can be stored in body tissues.
14. Why are water-soluble vitamins generally less likely than fat-soluble vitamins to
accumulate to toxic levels?
A. They cannot enter cells.
B. Excess amounts are commonly excreted in urine.
C. They provide no physiological function.
D. They are stored permanently in adipose tissue.
Answer: B
Many excess water-soluble vitamins are eliminated through urine, although toxicity can still
occur with excessive supplementation of certain vitamins.
15. Which vitamin is particularly important for normal blood clotting?
A. Vitamin K
B. Vitamin C
C. Vitamin B6
D. Vitamin B1
Answer: A
Vitamin K is required for synthesis of several proteins involved in normal blood coagulation.
16. Which food is a good dietary source of calcium?
A. Apples
B. Milk
C. Olive oil
D. White sugar
Answer: B
Milk provides highly bioavailable calcium and is a common dietary source of this mineral.
