DHN 101 Exam 1 Actual Exam Questions and Answers
Newest 2025 – 2026 Updated Questions From Actual Exams
Complete 150 Questions And Correct Detailed Answers
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1. Which of the following best defines nutrition
A. Study of digestion only
B. Study of food preparation
C. Study of nutrients in food and their effects on the body
D. Study of exercise science
✔ Correct Answer: C (Study of nutrients in food and their effects on the body)
Explanation: Nutrition focuses on how nutrients are consumed, absorbed, and used by
the body to support health.
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 calorie is defined as
A. A unit of protein
B. A unit of heat energy
C. A type of vitamin
D. A digestion enzyme
✔ Correct Answer: B (A unit of heat energy)
Explanation: A calorie measures the amount of energy food provides to the body.
4. Which macronutrient is the body's primary source of energy
A. Protein
B. Fat
C. Carbohydrates
D. Water
✔ Correct Answer: C (Carbohydrates)
Explanation: Carbohydrates are the preferred and most efficient energy source for the
body.
5. Essential nutrients are defined as nutrients that
A. Provide calories only
B. Must be obtained from the diet
C. Are stored indefinitely
D. Are produced in excess
✔ Correct Answer: B (Must be obtained from the diet)
Explanation: Essential nutrients cannot be synthesized by the body in sufficient
amounts.
,6. Which of the following is a micronutrient
A. Carbohydrate
B. Protein
C. Vitamin C
D. Fat
✔ Correct Answer: C (Vitamin C)
Explanation: Micronutrients include vitamins and minerals needed in small amounts.
7. Which nutrient is required in the largest quantity
A. Vitamins
B. Minerals
C. Water
D. Protein
✔ Correct Answer: C (Water)
Explanation: Water is essential for all physiological processes and required in the
greatest amount.
8. Basal metabolic rate refers to
A. Energy used during exercise
B. Energy used at rest
C. Energy used during digestion
D. Energy from food
✔ Correct Answer: B (Energy used at rest)
Explanation: BMR represents energy required to maintain basic body functions at rest.
9. Which organ is primarily responsible for nutrient absorption
A. Stomach
B. Liver
C. Small intestine
D. Large intestine
✔ Correct Answer: C (Small intestine)
Explanation: Most digestion and absorption occur in the small intestine.
10. Which of the following is a complete protein
A. Rice
B. Beans
C. Eggs
D. Bread
✔ Correct Answer: C (Eggs)
Explanation: Complete proteins contain all essential amino acids.
11. Case Study: A patient consumes a diet high in processed sugars and low in fiber. What is
the likely outcome
A. Improved digestion
B. Increased risk of constipation
C. Increased nutrient absorption
D. Reduced blood sugar
✔ Correct Answer: B (Increased risk of constipation)
Explanation: Low fiber intake leads to poor bowel movement and constipation.
12. Which vitamin is fat-soluble
A. Vitamin C
, B. Vitamin B12
C. Vitamin A
D. Vitamin B6
✔ Correct Answer: C (Vitamin A)
Explanation: Fat-soluble vitamins include A, D, E, and K.
13. Which mineral is important for oxygen transport
A. Calcium
B. Iron
C. Potassium
D. Sodium
✔ Correct Answer: B (Iron)
Explanation: Iron is a key component of hemoglobin in red blood cells.
14. Which nutrient helps build and repair tissues
A. Carbohydrates
B. Protein
C. Fat
D. Vitamins
✔ Correct Answer: B (Protein)
Explanation: Protein provides amino acids necessary for tissue repair.
15. Which system regulates hunger and satiety
A. Digestive system
B. Nervous system
C. Endocrine system
D. Immune system
✔ Correct Answer: C (Endocrine system)
Explanation: Hormones like ghrelin and leptin regulate hunger signals.
16. Which of the following is a simple carbohydrate
A. Starch
B. Fiber
C. Glucose
D. Glycogen
✔ Correct Answer: C (Glucose)
Explanation: Simple carbohydrates are sugars like glucose and fructose.
17. Which nutrient aids in insulation and protection
A. Protein
B. Carbohydrates
C. Fat
D. Vitamins
✔ Correct Answer: C (Fat)
Explanation: Fat cushions organs and helps regulate body temperature.
18. Which vitamin is important for blood clotting
A. Vitamin A
B. Vitamin K
C. Vitamin C
D. Vitamin D
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 digestion only
B. Study of food preparation
C. Study of nutrients in food and their effects on the body
D. Study of exercise science
✔ Correct Answer: C (Study of nutrients in food and their effects on the body)
Explanation: Nutrition focuses on how nutrients are consumed, absorbed, and used by
the body to support health.
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 calorie is defined as
A. A unit of protein
B. A unit of heat energy
C. A type of vitamin
D. A digestion enzyme
✔ Correct Answer: B (A unit of heat energy)
Explanation: A calorie measures the amount of energy food provides to the body.
4. Which macronutrient is the body's primary source of energy
A. Protein
B. Fat
C. Carbohydrates
D. Water
✔ Correct Answer: C (Carbohydrates)
Explanation: Carbohydrates are the preferred and most efficient energy source for the
body.
5. Essential nutrients are defined as nutrients that
A. Provide calories only
B. Must be obtained from the diet
C. Are stored indefinitely
D. Are produced in excess
✔ Correct Answer: B (Must be obtained from the diet)
Explanation: Essential nutrients cannot be synthesized by the body in sufficient
amounts.
,6. Which of the following is a micronutrient
A. Carbohydrate
B. Protein
C. Vitamin C
D. Fat
✔ Correct Answer: C (Vitamin C)
Explanation: Micronutrients include vitamins and minerals needed in small amounts.
7. Which nutrient is required in the largest quantity
A. Vitamins
B. Minerals
C. Water
D. Protein
✔ Correct Answer: C (Water)
Explanation: Water is essential for all physiological processes and required in the
greatest amount.
8. Basal metabolic rate refers to
A. Energy used during exercise
B. Energy used at rest
C. Energy used during digestion
D. Energy from food
✔ Correct Answer: B (Energy used at rest)
Explanation: BMR represents energy required to maintain basic body functions at rest.
9. Which organ is primarily responsible for nutrient absorption
A. Stomach
B. Liver
C. Small intestine
D. Large intestine
✔ Correct Answer: C (Small intestine)
Explanation: Most digestion and absorption occur in the small intestine.
10. Which of the following is a complete protein
A. Rice
B. Beans
C. Eggs
D. Bread
✔ Correct Answer: C (Eggs)
Explanation: Complete proteins contain all essential amino acids.
11. Case Study: A patient consumes a diet high in processed sugars and low in fiber. What is
the likely outcome
A. Improved digestion
B. Increased risk of constipation
C. Increased nutrient absorption
D. Reduced blood sugar
✔ Correct Answer: B (Increased risk of constipation)
Explanation: Low fiber intake leads to poor bowel movement and constipation.
12. Which vitamin is fat-soluble
A. Vitamin C
, B. Vitamin B12
C. Vitamin A
D. Vitamin B6
✔ Correct Answer: C (Vitamin A)
Explanation: Fat-soluble vitamins include A, D, E, and K.
13. Which mineral is important for oxygen transport
A. Calcium
B. Iron
C. Potassium
D. Sodium
✔ Correct Answer: B (Iron)
Explanation: Iron is a key component of hemoglobin in red blood cells.
14. Which nutrient helps build and repair tissues
A. Carbohydrates
B. Protein
C. Fat
D. Vitamins
✔ Correct Answer: B (Protein)
Explanation: Protein provides amino acids necessary for tissue repair.
15. Which system regulates hunger and satiety
A. Digestive system
B. Nervous system
C. Endocrine system
D. Immune system
✔ Correct Answer: C (Endocrine system)
Explanation: Hormones like ghrelin and leptin regulate hunger signals.
16. Which of the following is a simple carbohydrate
A. Starch
B. Fiber
C. Glucose
D. Glycogen
✔ Correct Answer: C (Glucose)
Explanation: Simple carbohydrates are sugars like glucose and fructose.
17. Which nutrient aids in insulation and protection
A. Protein
B. Carbohydrates
C. Fat
D. Vitamins
✔ Correct Answer: C (Fat)
Explanation: Fat cushions organs and helps regulate body temperature.
18. Which vitamin is important for blood clotting
A. Vitamin A
B. Vitamin K
C. Vitamin C
D. Vitamin D
