,WGU D440 Nutrition OA Exam Practice Questions
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1. Which macronutrient provides the most energy per gram?
a) Protein (4 kcal/g)
b) Carbohydrate (4 kcal/g)
c) Fat (9 kcal/g)
d) Alcohol (7 kcal/g)
Answer: c) Fat (9 kcal/g)
Rationale: Fat provides 9 kilocalories per gram, more than double the energy of
carbohydrates and proteins. Alcohol provides 7 kcal/g but is not considered an essential
nutrient. This high energy density makes fat an efficient storage form of energy .
2. A nurse is educating a client about complete proteins. Which food source
contains all nine essential amino acids?
a) Lentils
b) Eggs
c) Brown rice
d) Peanut butter
Answer: b) Eggs
Rationale: Animal products such as eggs, meat, poultry, fish, and dairy are complete
proteins containing all nine essential amino acids. Most plant proteins are incomplete,
lacking one or more essential amino acids. Soy is a notable exception among plant-based
proteins .
3. What is the definition of nutrition?
a) The study of food processing and packaging
b) The intake of food, considered in relation to the body's dietary needs
,c) The study of the effects of food components on disease
d) The practice of eliminating food groups for health
Answer: b) The intake of food, considered in relation to the body's dietary needs
Rationale: Nutrition is defined as the intake of food, considered in relation to the body's
dietary needs. Nutrition science is the study of the effects of food components on
metabolism, health, performance, and disease resistance .
4. What is the correct term for the discipline that applies nutrition science to
promote human health and treat disease?
a) Nutritional epidemiology
b) Dietetics
c) Food science
d) Wellness coaching
Answer: b) Dietetics
Rationale: Dietetics is the use of evidence-based practices in the area of food and nutrition
to improve and maintain good health .
5. Which of the following is an example of an essential nutrient?
a) Glucose
b) Vitamin C
c) Glycogen
d) Cholesterol
Answer: b) Vitamin C
Rationale: Essential nutrients are those that the body cannot synthesize on its own (or not
in adequate amounts) and must be provided by the diet, such as vitamin C and calcium.
Glucose can be made by the body, and glycogen is a storage form of glucose .
6. To sustain life, nutrients in food must perform which 3 functions in the body?
, a) Build tissue, provide energy, regulate metabolic processes
b) Build tissue, store fat, produce hormones
c) Provide energy, store vitamins, synthesize enzymes
d) Regulate pH, build tissue, eliminate waste
Answer: a) Build tissue, provide energy, regulate metabolic processes
Rationale: The three primary functions of nutrients are to provide energy, build and repair
tissue, and regulate metabolic processes. These functions are essential for sustaining life .
7. What is the Acceptable Macronutrient Distribution Range (AMDR) for
carbohydrates?
a) 10-35%
b) 20-35%
c) 45-65%
d) 5-20%
Answer: c) 45-65%
Rationale: The AMDR for carbohydrates is 45-65% of total daily calories. Carbohydrates
are the body's primary energy source and should form the foundation of a healthy diet .
8. What is the AMDR for fats?
a) 10-35%
b) 20-35%
c) 45-65%
d) 5-20%
Answer: b) 20-35%
Rationale: The AMDR for fats is 20-35% of total daily calories. Lipids serve multiple
functions including long-term energy storage, insulation, and hormone production .
9. What is the AMDR for proteins?
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1. Which macronutrient provides the most energy per gram?
a) Protein (4 kcal/g)
b) Carbohydrate (4 kcal/g)
c) Fat (9 kcal/g)
d) Alcohol (7 kcal/g)
Answer: c) Fat (9 kcal/g)
Rationale: Fat provides 9 kilocalories per gram, more than double the energy of
carbohydrates and proteins. Alcohol provides 7 kcal/g but is not considered an essential
nutrient. This high energy density makes fat an efficient storage form of energy .
2. A nurse is educating a client about complete proteins. Which food source
contains all nine essential amino acids?
a) Lentils
b) Eggs
c) Brown rice
d) Peanut butter
Answer: b) Eggs
Rationale: Animal products such as eggs, meat, poultry, fish, and dairy are complete
proteins containing all nine essential amino acids. Most plant proteins are incomplete,
lacking one or more essential amino acids. Soy is a notable exception among plant-based
proteins .
3. What is the definition of nutrition?
a) The study of food processing and packaging
b) The intake of food, considered in relation to the body's dietary needs
,c) The study of the effects of food components on disease
d) The practice of eliminating food groups for health
Answer: b) The intake of food, considered in relation to the body's dietary needs
Rationale: Nutrition is defined as the intake of food, considered in relation to the body's
dietary needs. Nutrition science is the study of the effects of food components on
metabolism, health, performance, and disease resistance .
4. What is the correct term for the discipline that applies nutrition science to
promote human health and treat disease?
a) Nutritional epidemiology
b) Dietetics
c) Food science
d) Wellness coaching
Answer: b) Dietetics
Rationale: Dietetics is the use of evidence-based practices in the area of food and nutrition
to improve and maintain good health .
5. Which of the following is an example of an essential nutrient?
a) Glucose
b) Vitamin C
c) Glycogen
d) Cholesterol
Answer: b) Vitamin C
Rationale: Essential nutrients are those that the body cannot synthesize on its own (or not
in adequate amounts) and must be provided by the diet, such as vitamin C and calcium.
Glucose can be made by the body, and glycogen is a storage form of glucose .
6. To sustain life, nutrients in food must perform which 3 functions in the body?
, a) Build tissue, provide energy, regulate metabolic processes
b) Build tissue, store fat, produce hormones
c) Provide energy, store vitamins, synthesize enzymes
d) Regulate pH, build tissue, eliminate waste
Answer: a) Build tissue, provide energy, regulate metabolic processes
Rationale: The three primary functions of nutrients are to provide energy, build and repair
tissue, and regulate metabolic processes. These functions are essential for sustaining life .
7. What is the Acceptable Macronutrient Distribution Range (AMDR) for
carbohydrates?
a) 10-35%
b) 20-35%
c) 45-65%
d) 5-20%
Answer: c) 45-65%
Rationale: The AMDR for carbohydrates is 45-65% of total daily calories. Carbohydrates
are the body's primary energy source and should form the foundation of a healthy diet .
8. What is the AMDR for fats?
a) 10-35%
b) 20-35%
c) 45-65%
d) 5-20%
Answer: b) 20-35%
Rationale: The AMDR for fats is 20-35% of total daily calories. Lipids serve multiple
functions including long-term energy storage, insulation, and hormone production .
9. What is the AMDR for proteins?
