DHN 101 EXAM 3 LATEST 2026 UPDATE 100
QUESTIONS AND DETAILED VERIFIED ANSWERS
FROM ACTUAL EXAMS TEST GRADE A+
1. Which vitamin is essential for calcium absorption in the body?
A. Vitamin A
B. Vitamin C
C. Vitamin D
D. Vitamin K
Answer: C. Vitamin D
Vitamin D enhances intestinal absorption of calcium, making it critical for bone
health.
2. Which mineral is most important for oxygen transport in the blood?
A. Calcium
B. Iron
C. Potassium
D. Sodium
Answer: B. Iron
Iron is a key component of hemoglobin, which carries oxygen in red blood cells.
3. What is the primary function of carbohydrates in the body?
A. Tissue repair
B. Energy production
C. Hormone regulation
D. Bone formation
,Answer: B. Energy production
Carbohydrates are the body's preferred and primary source of energy.
4. Which nutrient provides the most energy per gram?
A. Protein
B. Carbohydrates
C. Fat
D. Vitamins
Answer: C. Fat
Fat provides 9 kcal per gram, more than carbohydrates or protein (4 kcal per
gram).
5. Which vitamin is known as ascorbic acid?
A. Vitamin A
B. Vitamin B12
C. Vitamin C
D. Vitamin D
Answer: C. Vitamin C
Vitamin C, or ascorbic acid, is important for immune function and collagen
synthesis.
6. Which condition results from vitamin D deficiency in children?
A. Scurvy
B. Rickets
C. Pellagra
D. Beriberi
Answer: B. Rickets
Rickets causes soft and weak bones due to inadequate mineralization.
, 7. Which nutrient is the main building block for body tissues?
A. Carbohydrates
B. Fats
C. Proteins
D. Vitamins
Answer: C. Proteins
Proteins provide amino acids necessary for growth and tissue repair.
8. Which vitamin is fat-soluble?
A. Vitamin B1
B. Vitamin C
C. Vitamin D
D. Vitamin B6
Answer: C. Vitamin D
Fat-soluble vitamins include A, D, E, and K.
9. Which mineral helps regulate fluid balance in the body?
A. Iron
B. Sodium
C. Zinc
D. Calcium
Answer: B. Sodium
Sodium plays a key role in maintaining fluid balance and nerve function.
10. Which nutrient is most directly involved in enzyme function?
A. Vitamins
B. Carbohydrates
QUESTIONS AND DETAILED VERIFIED ANSWERS
FROM ACTUAL EXAMS TEST GRADE A+
1. Which vitamin is essential for calcium absorption in the body?
A. Vitamin A
B. Vitamin C
C. Vitamin D
D. Vitamin K
Answer: C. Vitamin D
Vitamin D enhances intestinal absorption of calcium, making it critical for bone
health.
2. Which mineral is most important for oxygen transport in the blood?
A. Calcium
B. Iron
C. Potassium
D. Sodium
Answer: B. Iron
Iron is a key component of hemoglobin, which carries oxygen in red blood cells.
3. What is the primary function of carbohydrates in the body?
A. Tissue repair
B. Energy production
C. Hormone regulation
D. Bone formation
,Answer: B. Energy production
Carbohydrates are the body's preferred and primary source of energy.
4. Which nutrient provides the most energy per gram?
A. Protein
B. Carbohydrates
C. Fat
D. Vitamins
Answer: C. Fat
Fat provides 9 kcal per gram, more than carbohydrates or protein (4 kcal per
gram).
5. Which vitamin is known as ascorbic acid?
A. Vitamin A
B. Vitamin B12
C. Vitamin C
D. Vitamin D
Answer: C. Vitamin C
Vitamin C, or ascorbic acid, is important for immune function and collagen
synthesis.
6. Which condition results from vitamin D deficiency in children?
A. Scurvy
B. Rickets
C. Pellagra
D. Beriberi
Answer: B. Rickets
Rickets causes soft and weak bones due to inadequate mineralization.
, 7. Which nutrient is the main building block for body tissues?
A. Carbohydrates
B. Fats
C. Proteins
D. Vitamins
Answer: C. Proteins
Proteins provide amino acids necessary for growth and tissue repair.
8. Which vitamin is fat-soluble?
A. Vitamin B1
B. Vitamin C
C. Vitamin D
D. Vitamin B6
Answer: C. Vitamin D
Fat-soluble vitamins include A, D, E, and K.
9. Which mineral helps regulate fluid balance in the body?
A. Iron
B. Sodium
C. Zinc
D. Calcium
Answer: B. Sodium
Sodium plays a key role in maintaining fluid balance and nerve function.
10. Which nutrient is most directly involved in enzyme function?
A. Vitamins
B. Carbohydrates
