WGU D440 NUTRITION OBJECTIVE ASSESSMENT LATEST
2026 EXAM PREPARATION | WGU D440 OA VERIFIED
PRACTICE TEST | COMPLETE NUTRITION STUDY GUIDE
WITH ACTUAL EXAM QUESTIONS AND ACCURATE
ANSWERS | UPDATED WGU HEALTH AND NUTRITION
EXAM SUCCESS MATERIAL
WGU D440 Nutrition Objective Assessment Sample Exam
Question 1:
What is the primary function of carbohydrates in the human body?
A) Provide insulation
B) Serve as a secondary energy source
C) Provide energy for immediate use
D) Aid in hormone production
Correct Option: C) Provide energy for immediate use
Rationale: Carbohydrates are the body’s main source of energy. They are broken down into
glucose, which is used by the body's cells for fuel. While fats also serve as an energy source,
carbohydrates provide quick energy, making them the primary choice for immediate energy
needs.
Question 2:
Which vitamin is essential for calcium absorption in the body?
A) Vitamin A
B) Vitamin D
C) Vitamin E
D) Vitamin K
Correct Option: B) Vitamin D
Rationale: Vitamin D plays a crucial role in calcium absorption in the intestines. It promotes the
synthesis of proteins that facilitate calcium uptake. Without sufficient vitamin D, the body cannot
effectively absorb calcium, which is necessary for strong bones and teeth.
Question 3:
Which macronutrient has the highest energy density?
, A) Carbohydrates
B) Protein
C) Fat
D) Water
Correct Option: C) Fat
Rationale: Fat provides about 9 calories per gram, making it the most energy-dense
macronutrient. In comparison, carbohydrates and proteins provide about 4 calories per gram.
This characteristic makes fats a significant source of energy, especially in a diet requiring high
caloric intake.
Question 4:
What is the recommended daily intake of fiber for adults?
A) 10 grams
B) 25 grams
C) 35 grams
D) 50 grams
Correct Option: B) 25 grams
Rationale: The recommended daily fiber intake is 25 grams for adult women and 38 grams for
adult men. Fiber is essential for digestive health, helps maintain bowel regularity, and can
prevent various diseases. Insufficient fiber intake can lead to digestive issues and increased risk
of chronic diseases.
Question 5:
Which of the following foods is the best source of omega-3 fatty acids?
A) Chicken
B) Olive oil
C) Salmon
D) Corn
Correct Option: C) Salmon
Rationale: Salmon is rich in omega-3 fatty acids, which are essential for heart health and brain
function. Omega-3 fatty acids help reduce inflammation and are critical for maintaining a healthy
cholesterol level. While olive oil is a healthy fat, it is primarily composed of omega-9 fatty acids,
not omega-3.
2026 EXAM PREPARATION | WGU D440 OA VERIFIED
PRACTICE TEST | COMPLETE NUTRITION STUDY GUIDE
WITH ACTUAL EXAM QUESTIONS AND ACCURATE
ANSWERS | UPDATED WGU HEALTH AND NUTRITION
EXAM SUCCESS MATERIAL
WGU D440 Nutrition Objective Assessment Sample Exam
Question 1:
What is the primary function of carbohydrates in the human body?
A) Provide insulation
B) Serve as a secondary energy source
C) Provide energy for immediate use
D) Aid in hormone production
Correct Option: C) Provide energy for immediate use
Rationale: Carbohydrates are the body’s main source of energy. They are broken down into
glucose, which is used by the body's cells for fuel. While fats also serve as an energy source,
carbohydrates provide quick energy, making them the primary choice for immediate energy
needs.
Question 2:
Which vitamin is essential for calcium absorption in the body?
A) Vitamin A
B) Vitamin D
C) Vitamin E
D) Vitamin K
Correct Option: B) Vitamin D
Rationale: Vitamin D plays a crucial role in calcium absorption in the intestines. It promotes the
synthesis of proteins that facilitate calcium uptake. Without sufficient vitamin D, the body cannot
effectively absorb calcium, which is necessary for strong bones and teeth.
Question 3:
Which macronutrient has the highest energy density?
, A) Carbohydrates
B) Protein
C) Fat
D) Water
Correct Option: C) Fat
Rationale: Fat provides about 9 calories per gram, making it the most energy-dense
macronutrient. In comparison, carbohydrates and proteins provide about 4 calories per gram.
This characteristic makes fats a significant source of energy, especially in a diet requiring high
caloric intake.
Question 4:
What is the recommended daily intake of fiber for adults?
A) 10 grams
B) 25 grams
C) 35 grams
D) 50 grams
Correct Option: B) 25 grams
Rationale: The recommended daily fiber intake is 25 grams for adult women and 38 grams for
adult men. Fiber is essential for digestive health, helps maintain bowel regularity, and can
prevent various diseases. Insufficient fiber intake can lead to digestive issues and increased risk
of chronic diseases.
Question 5:
Which of the following foods is the best source of omega-3 fatty acids?
A) Chicken
B) Olive oil
C) Salmon
D) Corn
Correct Option: C) Salmon
Rationale: Salmon is rich in omega-3 fatty acids, which are essential for heart health and brain
function. Omega-3 fatty acids help reduce inflammation and are critical for maintaining a healthy
cholesterol level. While olive oil is a healthy fat, it is primarily composed of omega-9 fatty acids,
not omega-3.
