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
Question 1:
What is the primary function of carbohydrates in the human body?
A) To repair tissues
B) To provide energy
C) To regulate body temperature
D) To transport nutrients
Correct Option: B) To provide energy
Rationale:
Carbohydrates are the body’s main source of energy. They are broken down into glucose, which
is used by the body’s cells to produce energy. While proteins can also provide energy, their
primary function is to build and repair tissues. Fats are another source of energy, but
carbohydrates are the preferred and most readily available energy source for the body's
physiological processes.
Question 2:
Which vitamin is primarily responsible for blood clotting?
A) Vitamin A
B) Vitamin K
C) Vitamin C
D) Vitamin D
Correct Option: B) Vitamin K
Rationale:
Vitamin K plays a crucial role in the synthesis of certain proteins required for blood coagulation
(clotting) and the metabolism of bone proteins. Deficiency in Vitamin K can lead to increased
bleeding and bruising. While other vitamins such as Vitamin C are important for overall health
and the immune system, they do not have a direct role in clotting.
, Question 3:
Which of the following dietary patterns is associated with a lower risk of chronic diseases?
A) High sodium intake
B) Mediterranean diet
C) High sugar diet
D) Low fat diet
Correct Option: B) Mediterranean diet
Rationale:
The Mediterranean diet, which emphasizes fruits, vegetables, whole grains, fish, and healthy fats
(like olive oil), has been associated with numerous health benefits, including a lower risk of heart
disease, diabetes, and certain cancers. In contrast, high sodium and high sugar diets are linked to
increased health risks. While low fat diets can be beneficial, it's more about the types of fats
consumed rather than fat content alone.
Question 4:
What is the recommended daily intake of fiber for adults?
A) 10-15 grams
B) 25-30 grams
C) 40-50 grams
D) 5-10 grams
Correct Option: B) 25-30 grams
Rationale:
The general recommendation for daily fiber intake is 25 grams for women and 38 grams for men,
which translates to the guideline of around 25-30 grams for adults. Fiber plays a critical role in
digestive health, helps regulate blood sugar levels, and contributes to heart health. Many people
do not meet these recommendations, leading to various health issues.
Question 5:
Which mineral is critical for oxygen transport in the blood?
A) Calcium
B) Iron
C) Zinc
D) Magnesium
Correct Option: B) Iron
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
Question 1:
What is the primary function of carbohydrates in the human body?
A) To repair tissues
B) To provide energy
C) To regulate body temperature
D) To transport nutrients
Correct Option: B) To provide energy
Rationale:
Carbohydrates are the body’s main source of energy. They are broken down into glucose, which
is used by the body’s cells to produce energy. While proteins can also provide energy, their
primary function is to build and repair tissues. Fats are another source of energy, but
carbohydrates are the preferred and most readily available energy source for the body's
physiological processes.
Question 2:
Which vitamin is primarily responsible for blood clotting?
A) Vitamin A
B) Vitamin K
C) Vitamin C
D) Vitamin D
Correct Option: B) Vitamin K
Rationale:
Vitamin K plays a crucial role in the synthesis of certain proteins required for blood coagulation
(clotting) and the metabolism of bone proteins. Deficiency in Vitamin K can lead to increased
bleeding and bruising. While other vitamins such as Vitamin C are important for overall health
and the immune system, they do not have a direct role in clotting.
, Question 3:
Which of the following dietary patterns is associated with a lower risk of chronic diseases?
A) High sodium intake
B) Mediterranean diet
C) High sugar diet
D) Low fat diet
Correct Option: B) Mediterranean diet
Rationale:
The Mediterranean diet, which emphasizes fruits, vegetables, whole grains, fish, and healthy fats
(like olive oil), has been associated with numerous health benefits, including a lower risk of heart
disease, diabetes, and certain cancers. In contrast, high sodium and high sugar diets are linked to
increased health risks. While low fat diets can be beneficial, it's more about the types of fats
consumed rather than fat content alone.
Question 4:
What is the recommended daily intake of fiber for adults?
A) 10-15 grams
B) 25-30 grams
C) 40-50 grams
D) 5-10 grams
Correct Option: B) 25-30 grams
Rationale:
The general recommendation for daily fiber intake is 25 grams for women and 38 grams for men,
which translates to the guideline of around 25-30 grams for adults. Fiber plays a critical role in
digestive health, helps regulate blood sugar levels, and contributes to heart health. Many people
do not meet these recommendations, leading to various health issues.
Question 5:
Which mineral is critical for oxygen transport in the blood?
A) Calcium
B) Iron
C) Zinc
D) Magnesium
Correct Option: B) Iron
