Texas Dietitian Licensing Exam – Practice
Questions And Correct Answers (Verified
Answers) Plus Rationales /2026 Q&A | Instant
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1. Which nutrient is the primary energy source for the brain?
A. Protein
B. Fat
C. Carbohydrate
D. Vitamins
The brain primarily uses glucose, a carbohydrate, as its main energy source.
2. Which vitamin deficiency is most associated with night blindness?
A. Vitamin D
B. Vitamin E
C. Vitamin K
D. Vitamin A
Vitamin A deficiency impairs the retina’s ability to adapt to low-light conditions,
leading to night blindness.
3. What is the main storage form of carbohydrates in the body?
A. Glucose
B. Glycogen
,C. Lactose
D. Galactose
Glycogen is the stored form of glucose found mainly in the liver and muscles.
4. Which of the following is a water-soluble vitamin?
A. Vitamin A
B. Vitamin D
C. Vitamin K
D. Vitamin C
Vitamin C is water-soluble, unlike vitamins A, D, E, and K, which are fat-soluble.
5. Which mineral is most associated with oxygen transport in the blood?
A. Calcium
B. Zinc
C. Iron
D. Phosphorus
Iron is a key component of hemoglobin, the molecule responsible for carrying
oxygen in red blood cells.
6. Which type of study provides the strongest level of scientific evidence?
A. Case study
B. Cross-sectional study
C. Cohort study
D. Randomized controlled trial
RCTs minimize bias and are considered the gold standard in clinical research.
, 7. What is the recommended dietary allowance (RDA) for protein in adults?
A. 0.4 g/kg
B. 0.6 g/kg
C. 0.8 g/kg
D. 1.2 g/kg
Adults typically need 0.8 grams of protein per kilogram of body weight per day.
8. Which lipoprotein is considered “good cholesterol”?
A. VLDL
B. LDL
C. HDL
D. Chylomicron
HDL helps transport cholesterol from tissues to the liver for excretion, protecting
cardiovascular health.
9. A patient with celiac disease must avoid which of the following?
A. Rice
B. Corn
C. Wheat
D. Potatoes
Wheat contains gluten, which damages the intestinal lining in people with celiac
disease.
10. What is the main function of bile in digestion?
A. Absorb glucose
B. Emulsify fats
Questions And Correct Answers (Verified
Answers) Plus Rationales /2026 Q&A | Instant
Download Pdf
1. Which nutrient is the primary energy source for the brain?
A. Protein
B. Fat
C. Carbohydrate
D. Vitamins
The brain primarily uses glucose, a carbohydrate, as its main energy source.
2. Which vitamin deficiency is most associated with night blindness?
A. Vitamin D
B. Vitamin E
C. Vitamin K
D. Vitamin A
Vitamin A deficiency impairs the retina’s ability to adapt to low-light conditions,
leading to night blindness.
3. What is the main storage form of carbohydrates in the body?
A. Glucose
B. Glycogen
,C. Lactose
D. Galactose
Glycogen is the stored form of glucose found mainly in the liver and muscles.
4. Which of the following is a water-soluble vitamin?
A. Vitamin A
B. Vitamin D
C. Vitamin K
D. Vitamin C
Vitamin C is water-soluble, unlike vitamins A, D, E, and K, which are fat-soluble.
5. Which mineral is most associated with oxygen transport in the blood?
A. Calcium
B. Zinc
C. Iron
D. Phosphorus
Iron is a key component of hemoglobin, the molecule responsible for carrying
oxygen in red blood cells.
6. Which type of study provides the strongest level of scientific evidence?
A. Case study
B. Cross-sectional study
C. Cohort study
D. Randomized controlled trial
RCTs minimize bias and are considered the gold standard in clinical research.
, 7. What is the recommended dietary allowance (RDA) for protein in adults?
A. 0.4 g/kg
B. 0.6 g/kg
C. 0.8 g/kg
D. 1.2 g/kg
Adults typically need 0.8 grams of protein per kilogram of body weight per day.
8. Which lipoprotein is considered “good cholesterol”?
A. VLDL
B. LDL
C. HDL
D. Chylomicron
HDL helps transport cholesterol from tissues to the liver for excretion, protecting
cardiovascular health.
9. A patient with celiac disease must avoid which of the following?
A. Rice
B. Corn
C. Wheat
D. Potatoes
Wheat contains gluten, which damages the intestinal lining in people with celiac
disease.
10. What is the main function of bile in digestion?
A. Absorb glucose
B. Emulsify fats
