ARIZONA DIETITIAN NUTRITIONIST
CERTIFICATION EXAM QUESTIONS WITH
CORRECT ANSWERS AND RATIONALES LATEST
2026 UPDATE
1. What is the primary role of a registered dietitian nutritionist
(RDN)?
A. Prescribe medications
B. Provide medical nutrition therapy
C. Perform surgical procedures
D. Diagnose diseases independently
Answer: B
Rationale: RDNs provide medical nutrition therapy but do not prescribe
drugs or perform surgery.
2. Which nutrient provides 9 kcal per gram?
A. Protein
B. Carbohydrate
C. Fat
D. Fiber
Answer: C
Rationale: Fat provides 9 kcal/g, more than carbs or protein (4 kcal/g).
3. Which vitamin is fat-soluble?
A. Vitamin C
B. Vitamin B12
C. Vitamin A
D. Folate
Answer: C
Rationale: Vitamins A, D, E, and K are fat-soluble.
4. What is the main function of dietary fiber?
A. Muscle building
, B. Blood clotting
C. Digestive regulation
D. Oxygen transport
Answer: C
Rationale: Fiber improves bowel movement and gut health.
5. Which condition is associated with vitamin D deficiency?
A. Scurvy
B. Rickets
C. Pellagra
D. Anemia
Answer: B
Rationale: Vitamin D deficiency causes rickets in children.
6. Which macronutrient is the body’s preferred energy source?
A. Protein
B. Carbohydrates
C. Fat
D. Vitamins
Answer: B
Rationale: Carbohydrates are the primary energy source.
7. Which organ produces bile?
A. Pancreas
B. Liver
C. Gallbladder
D. Stomach
Answer: B
Rationale: The liver produces bile; gallbladder stores it.
8. What is the recommended method for diagnosing malnutrition?
A. Blood pressure only
B. BMI + clinical assessment
C. Hair analysis
D. Eye exam
CERTIFICATION EXAM QUESTIONS WITH
CORRECT ANSWERS AND RATIONALES LATEST
2026 UPDATE
1. What is the primary role of a registered dietitian nutritionist
(RDN)?
A. Prescribe medications
B. Provide medical nutrition therapy
C. Perform surgical procedures
D. Diagnose diseases independently
Answer: B
Rationale: RDNs provide medical nutrition therapy but do not prescribe
drugs or perform surgery.
2. Which nutrient provides 9 kcal per gram?
A. Protein
B. Carbohydrate
C. Fat
D. Fiber
Answer: C
Rationale: Fat provides 9 kcal/g, more than carbs or protein (4 kcal/g).
3. Which vitamin is fat-soluble?
A. Vitamin C
B. Vitamin B12
C. Vitamin A
D. Folate
Answer: C
Rationale: Vitamins A, D, E, and K are fat-soluble.
4. What is the main function of dietary fiber?
A. Muscle building
, B. Blood clotting
C. Digestive regulation
D. Oxygen transport
Answer: C
Rationale: Fiber improves bowel movement and gut health.
5. Which condition is associated with vitamin D deficiency?
A. Scurvy
B. Rickets
C. Pellagra
D. Anemia
Answer: B
Rationale: Vitamin D deficiency causes rickets in children.
6. Which macronutrient is the body’s preferred energy source?
A. Protein
B. Carbohydrates
C. Fat
D. Vitamins
Answer: B
Rationale: Carbohydrates are the primary energy source.
7. Which organ produces bile?
A. Pancreas
B. Liver
C. Gallbladder
D. Stomach
Answer: B
Rationale: The liver produces bile; gallbladder stores it.
8. What is the recommended method for diagnosing malnutrition?
A. Blood pressure only
B. BMI + clinical assessment
C. Hair analysis
D. Eye exam
