DHN 101 EXAM 2 LATEST 2026 UPDATE 100
QUESTIONS AND DETAILED VERIFIED ANSWERS
FROM ACTUAL EXAMS TEST GRADE A+
1. Which nutrient is the primary source of energy for the body?
A. Protein
B. Fat
C. Carbohydrate
D. Vitamins
Answer: C. Carbohydrate
Carbohydrates are the body's preferred and primary energy source, especially for
the brain and muscles.
2. Which vitamin is fat-soluble?
A. Vitamin C
B. Vitamin B12
C. Vitamin A
D. Folate
Answer: C. Vitamin A
Fat-soluble vitamins include A, D, E, and K, which are stored in body fat.
3. What is the main function of protein in the body?
A. Provide energy only
B. Build and repair tissues
C. Regulate body temperature
D. Store fat
,Answer: B. Build and repair tissues
Proteins are essential for growth, repair, and maintenance of body tissues.
4. Which mineral is 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 the blood.
5. Which nutrient provides the most calories per gram?
A. Carbohydrates
B. Protein
C. Fat
D. Water
Answer: C. Fat
Fat provides 9 kcal per gram, more than carbohydrates and protein (4 kcal/g).
6. Which vitamin helps with calcium absorption?
A. Vitamin A
B. Vitamin D
C. Vitamin K
D. Vitamin C
Answer: B. Vitamin D
Vitamin D enhances calcium absorption in the intestines.
, 7. What is the primary function of dietary fiber?
A. Provide protein
B. Aid digestion
C. Supply vitamins
D. Store energy
Answer: B. Aid digestion
Fiber helps regulate bowel movements and supports digestive health.
8. Which nutrient is essential for muscle contraction?
A. Iron
B. Calcium
C. Zinc
D. Iodine
Answer: B. Calcium
Calcium plays a critical role in muscle contraction and nerve signaling.
9. Which macronutrient is important for hormone production?
A. Carbohydrates
B. Protein
C. Fat
D. Water
Answer: C. Fat
Fats are essential for hormone synthesis and cellular structure.
10. Which vitamin deficiency causes scurvy?
A. Vitamin D
B. Vitamin A
C. Vitamin C
D. Vitamin K
QUESTIONS AND DETAILED VERIFIED ANSWERS
FROM ACTUAL EXAMS TEST GRADE A+
1. Which nutrient is the primary source of energy for the body?
A. Protein
B. Fat
C. Carbohydrate
D. Vitamins
Answer: C. Carbohydrate
Carbohydrates are the body's preferred and primary energy source, especially for
the brain and muscles.
2. Which vitamin is fat-soluble?
A. Vitamin C
B. Vitamin B12
C. Vitamin A
D. Folate
Answer: C. Vitamin A
Fat-soluble vitamins include A, D, E, and K, which are stored in body fat.
3. What is the main function of protein in the body?
A. Provide energy only
B. Build and repair tissues
C. Regulate body temperature
D. Store fat
,Answer: B. Build and repair tissues
Proteins are essential for growth, repair, and maintenance of body tissues.
4. Which mineral is 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 the blood.
5. Which nutrient provides the most calories per gram?
A. Carbohydrates
B. Protein
C. Fat
D. Water
Answer: C. Fat
Fat provides 9 kcal per gram, more than carbohydrates and protein (4 kcal/g).
6. Which vitamin helps with calcium absorption?
A. Vitamin A
B. Vitamin D
C. Vitamin K
D. Vitamin C
Answer: B. Vitamin D
Vitamin D enhances calcium absorption in the intestines.
, 7. What is the primary function of dietary fiber?
A. Provide protein
B. Aid digestion
C. Supply vitamins
D. Store energy
Answer: B. Aid digestion
Fiber helps regulate bowel movements and supports digestive health.
8. Which nutrient is essential for muscle contraction?
A. Iron
B. Calcium
C. Zinc
D. Iodine
Answer: B. Calcium
Calcium plays a critical role in muscle contraction and nerve signaling.
9. Which macronutrient is important for hormone production?
A. Carbohydrates
B. Protein
C. Fat
D. Water
Answer: C. Fat
Fats are essential for hormone synthesis and cellular structure.
10. Which vitamin deficiency causes scurvy?
A. Vitamin D
B. Vitamin A
C. Vitamin C
D. Vitamin K
