DHN 101 Midterm 1 – Certification Practice Exam
Newest 2025 – 2026 Updated Questions From Actual
Exams Complete 150 Questions And Correct Detailed
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1. Which of the following best defines nutrition?
A. Study of exercise science
B. Study of nutrients and their interaction in the body
C. Study of diseases only
D. Study of medications
✔ Correct Answer: B (Study of nutrients and their interaction in the body)
Explanation: Nutrition focuses on how nutrients are consumed, metabolized, and
utilized by the body for health and function.
2. Which nutrient provides the most energy per gram?
A. Carbohydrates
B. Protein
C. Fat
D. Vitamins
✔ Correct Answer: C (Fat)
Explanation: Fat provides 9 kcal per gram, which is more than carbohydrates and
protein at 4 kcal per gram.
3. A deficiency of vitamin C leads to which condition?
A. Rickets
B. Scurvy
C. Anemia
D. Osteoporosis
✔ Correct Answer: B (Scurvy)
Explanation: Vitamin C deficiency impairs collagen synthesis, leading to scurvy
characterized by bleeding gums and weakness.
4. Which macronutrient is the body's primary source of energy?
A. Protein
B. Carbohydrates
C. Fat
D. Water
✔ Correct Answer: B (Carbohydrates)
Explanation: Carbohydrates are the preferred energy source, especially for the
brain and muscles during activity.
5. Which organ is primarily responsible for nutrient absorption?
A. Stomach
B. Liver
C. Small intestine
, D. Large intestine
✔ Correct Answer: C (Small intestine)
Explanation: The small intestine has villi and microvilli that maximize nutrient
absorption.
6. What is the recommended energy yield per gram of protein?
A. 9 kcal
B. 7 kcal
C. 4 kcal
D. 2 kcal
✔ Correct Answer: C (4 kcal)
Explanation: Protein provides 4 kcal per gram, similar to carbohydrates.
7. Which nutrient is essential for muscle repair?
A. Carbohydrates
B. Protein
C. Fat
D. Fiber
✔ Correct Answer: B (Protein)
Explanation: Protein supplies amino acids necessary for tissue growth and repair.
8. Which vitamin is fat-soluble?
A. Vitamin C
B. Vitamin B12
C. Vitamin D
D. Vitamin B6
✔ Correct Answer: C (Vitamin D)
Explanation: Fat-soluble vitamins include A, D, E, and K, stored in body fat.
9. Which mineral is essential for oxygen transport?
A. Calcium
B. Iron
C. Sodium
D. Potassium
✔ Correct Answer: B (Iron)
Explanation: Iron is a key component of hemoglobin, which carries oxygen in the
blood.
10. A balanced diet includes which proportion of macronutrients?
A. Only proteins
B. Only fats
C. Variety of carbs, proteins, and fats
D. Only vitamins
✔ Correct Answer: C (Variety of carbs, proteins, and fats)
Explanation: A balanced diet includes all macronutrients in appropriate
proportions for optimal health.
11. Which condition results from calcium deficiency?
A. Anemia
B. Osteoporosis
C. Hypertension
D. Diabetes
, ✔ Correct Answer: B (Osteoporosis)
Explanation: Low calcium intake weakens bones, increasing fracture risk.
12. Which vitamin aids calcium absorption?
A. Vitamin A
B. Vitamin C
C. Vitamin D
D. Vitamin K
✔ Correct Answer: C (Vitamin D)
Explanation: Vitamin D enhances intestinal absorption of calcium.
13. What is the main function of fiber?
A. Energy production
B. Muscle building
C. Digestive regulation
D. Oxygen transport
✔ Correct Answer: C (Digestive regulation)
Explanation: Fiber promotes bowel movement and digestive health.
14. Which nutrient does not provide energy?
A. Carbohydrates
B. Protein
C. Vitamins
D. Fat
✔ Correct Answer: C (Vitamins)
Explanation: Vitamins regulate body processes but do not supply calories.
15. What is BMI used to assess?
A. Bone density
B. Body weight relative to height
C. Blood pressure
D. Muscle strength
✔ Correct Answer: B (Body weight relative to height)
Explanation: BMI estimates body fat based on height and weight.
16. Which nutrient supports immune function?
A. Vitamin C
B. Fat
C. Sugar
D. Cholesterol
✔ Correct Answer: A (Vitamin C)
Explanation: Vitamin C enhances immune defense mechanisms.
17. Which is a complete protein source?
A. Rice
B. Beans
C. Eggs
D. Bread
✔ Correct Answer: C (Eggs)
Explanation: Complete proteins contain all essential amino acids.
Newest 2025 – 2026 Updated Questions From Actual
Exams Complete 150 Questions And Correct Detailed
Answers (Verified Answers) |Already Graded
A+||Brand New!!
1. Which of the following best defines nutrition?
A. Study of exercise science
B. Study of nutrients and their interaction in the body
C. Study of diseases only
D. Study of medications
✔ Correct Answer: B (Study of nutrients and their interaction in the body)
Explanation: Nutrition focuses on how nutrients are consumed, metabolized, and
utilized by the body for health and function.
2. Which nutrient provides the most energy per gram?
A. Carbohydrates
B. Protein
C. Fat
D. Vitamins
✔ Correct Answer: C (Fat)
Explanation: Fat provides 9 kcal per gram, which is more than carbohydrates and
protein at 4 kcal per gram.
3. A deficiency of vitamin C leads to which condition?
A. Rickets
B. Scurvy
C. Anemia
D. Osteoporosis
✔ Correct Answer: B (Scurvy)
Explanation: Vitamin C deficiency impairs collagen synthesis, leading to scurvy
characterized by bleeding gums and weakness.
4. Which macronutrient is the body's primary source of energy?
A. Protein
B. Carbohydrates
C. Fat
D. Water
✔ Correct Answer: B (Carbohydrates)
Explanation: Carbohydrates are the preferred energy source, especially for the
brain and muscles during activity.
5. Which organ is primarily responsible for nutrient absorption?
A. Stomach
B. Liver
C. Small intestine
, D. Large intestine
✔ Correct Answer: C (Small intestine)
Explanation: The small intestine has villi and microvilli that maximize nutrient
absorption.
6. What is the recommended energy yield per gram of protein?
A. 9 kcal
B. 7 kcal
C. 4 kcal
D. 2 kcal
✔ Correct Answer: C (4 kcal)
Explanation: Protein provides 4 kcal per gram, similar to carbohydrates.
7. Which nutrient is essential for muscle repair?
A. Carbohydrates
B. Protein
C. Fat
D. Fiber
✔ Correct Answer: B (Protein)
Explanation: Protein supplies amino acids necessary for tissue growth and repair.
8. Which vitamin is fat-soluble?
A. Vitamin C
B. Vitamin B12
C. Vitamin D
D. Vitamin B6
✔ Correct Answer: C (Vitamin D)
Explanation: Fat-soluble vitamins include A, D, E, and K, stored in body fat.
9. Which mineral is essential for oxygen transport?
A. Calcium
B. Iron
C. Sodium
D. Potassium
✔ Correct Answer: B (Iron)
Explanation: Iron is a key component of hemoglobin, which carries oxygen in the
blood.
10. A balanced diet includes which proportion of macronutrients?
A. Only proteins
B. Only fats
C. Variety of carbs, proteins, and fats
D. Only vitamins
✔ Correct Answer: C (Variety of carbs, proteins, and fats)
Explanation: A balanced diet includes all macronutrients in appropriate
proportions for optimal health.
11. Which condition results from calcium deficiency?
A. Anemia
B. Osteoporosis
C. Hypertension
D. Diabetes
, ✔ Correct Answer: B (Osteoporosis)
Explanation: Low calcium intake weakens bones, increasing fracture risk.
12. Which vitamin aids calcium absorption?
A. Vitamin A
B. Vitamin C
C. Vitamin D
D. Vitamin K
✔ Correct Answer: C (Vitamin D)
Explanation: Vitamin D enhances intestinal absorption of calcium.
13. What is the main function of fiber?
A. Energy production
B. Muscle building
C. Digestive regulation
D. Oxygen transport
✔ Correct Answer: C (Digestive regulation)
Explanation: Fiber promotes bowel movement and digestive health.
14. Which nutrient does not provide energy?
A. Carbohydrates
B. Protein
C. Vitamins
D. Fat
✔ Correct Answer: C (Vitamins)
Explanation: Vitamins regulate body processes but do not supply calories.
15. What is BMI used to assess?
A. Bone density
B. Body weight relative to height
C. Blood pressure
D. Muscle strength
✔ Correct Answer: B (Body weight relative to height)
Explanation: BMI estimates body fat based on height and weight.
16. Which nutrient supports immune function?
A. Vitamin C
B. Fat
C. Sugar
D. Cholesterol
✔ Correct Answer: A (Vitamin C)
Explanation: Vitamin C enhances immune defense mechanisms.
17. Which is a complete protein source?
A. Rice
B. Beans
C. Eggs
D. Bread
✔ Correct Answer: C (Eggs)
Explanation: Complete proteins contain all essential amino acids.
