ARIZONA DIETITIAN NUTRITIONIST CERTIFICATION EXAM QUESTIONS WITH CORRECT ANSWERS AND RATIONALES LATEST 2026 UPDATE

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