DHN 101 EXAM 1 (Human Nutrition –
Fundamentals) LATEST 2026 UPDATE 100
QUESTIONS AND DETAILED VERIFIED ANSWERS
FROM ACTUAL EXAMS TEST GRADE A+
1.
Which nutrient provides the most energy per gram?
A. Carbohydrates
B. Protein
C. Fat
D. Vitamins
Answer: C. Fat
Rationale: Fat provides 9 kcal/g, while carbohydrates and protein provide 4 kcal/g,
and vitamins provide no energy.
2.
Which vitamin is classified as fat-soluble?
A. Vitamin C
B. Vitamin B12
C. Vitamin A
D. Folate
Answer: C. Vitamin A
Rationale: Fat-soluble vitamins include A, D, E, and K.
3.
,The primary function of carbohydrates in the body is to:
A. Build muscle
B. Provide energy
C. Regulate hormones
D. Form enzymes
Answer: B. Provide energy
Rationale: Carbohydrates are the body's main and preferred energy source.
4.
Which organ is primarily responsible for nutrient absorption?
A. Stomach
B. Liver
C. Small intestine
D. Large intestine
Answer: C. Small intestine
Rationale: Most nutrient absorption occurs in the small intestine due to its large
surface area.
5.
What is the main function of protein?
A. Energy storage
B. Tissue repair and growth
C. Hormone storage
D. Insulation
Answer: B. Tissue repair and growth
Rationale: Proteins are essential for building and repairing body tissues.
6.
,Which nutrient is essential for maintaining fluid balance?
A. Iron
B. Sodium
C. Vitamin D
D. Calcium
Answer: B. Sodium
Rationale: Sodium regulates fluid balance and electrolyte levels.
7.
What is the recommended unit for measuring energy in nutrition?
A. Grams
B. Liters
C. Kilocalories
D. Milligrams
Answer: C. Kilocalories
Rationale: Energy intake is measured in kilocalories (kcal).
8.
Which nutrient is NOT an energy-yielding nutrient?
A. Fat
B. Protein
C. Vitamins
D. Carbohydrates
Answer: C. Vitamins
Rationale: Vitamins do not provide energy but regulate body processes.
9.
, Which vitamin is necessary for calcium absorption?
A. Vitamin A
B. Vitamin D
C. Vitamin K
D. Vitamin C
Answer: B. Vitamin D
Rationale: Vitamin D enhances calcium absorption in the intestines.
10.
The process of breaking down food into absorbable units is called:
A. Metabolism
B. Digestion
C. Absorption
D. Circulation
Answer: B. Digestion
Rationale: Digestion involves mechanical and chemical breakdown of food.
11.
Which macronutrient contains nitrogen?
A. Carbohydrates
B. Fat
C. Protein
D. Fiber
Answer: C. Protein
Rationale: Proteins are made of amino acids that contain nitrogen.
12.
Fundamentals) LATEST 2026 UPDATE 100
QUESTIONS AND DETAILED VERIFIED ANSWERS
FROM ACTUAL EXAMS TEST GRADE A+
1.
Which nutrient provides the most energy per gram?
A. Carbohydrates
B. Protein
C. Fat
D. Vitamins
Answer: C. Fat
Rationale: Fat provides 9 kcal/g, while carbohydrates and protein provide 4 kcal/g,
and vitamins provide no energy.
2.
Which vitamin is classified as fat-soluble?
A. Vitamin C
B. Vitamin B12
C. Vitamin A
D. Folate
Answer: C. Vitamin A
Rationale: Fat-soluble vitamins include A, D, E, and K.
3.
,The primary function of carbohydrates in the body is to:
A. Build muscle
B. Provide energy
C. Regulate hormones
D. Form enzymes
Answer: B. Provide energy
Rationale: Carbohydrates are the body's main and preferred energy source.
4.
Which organ is primarily responsible for nutrient absorption?
A. Stomach
B. Liver
C. Small intestine
D. Large intestine
Answer: C. Small intestine
Rationale: Most nutrient absorption occurs in the small intestine due to its large
surface area.
5.
What is the main function of protein?
A. Energy storage
B. Tissue repair and growth
C. Hormone storage
D. Insulation
Answer: B. Tissue repair and growth
Rationale: Proteins are essential for building and repairing body tissues.
6.
,Which nutrient is essential for maintaining fluid balance?
A. Iron
B. Sodium
C. Vitamin D
D. Calcium
Answer: B. Sodium
Rationale: Sodium regulates fluid balance and electrolyte levels.
7.
What is the recommended unit for measuring energy in nutrition?
A. Grams
B. Liters
C. Kilocalories
D. Milligrams
Answer: C. Kilocalories
Rationale: Energy intake is measured in kilocalories (kcal).
8.
Which nutrient is NOT an energy-yielding nutrient?
A. Fat
B. Protein
C. Vitamins
D. Carbohydrates
Answer: C. Vitamins
Rationale: Vitamins do not provide energy but regulate body processes.
9.
, Which vitamin is necessary for calcium absorption?
A. Vitamin A
B. Vitamin D
C. Vitamin K
D. Vitamin C
Answer: B. Vitamin D
Rationale: Vitamin D enhances calcium absorption in the intestines.
10.
The process of breaking down food into absorbable units is called:
A. Metabolism
B. Digestion
C. Absorption
D. Circulation
Answer: B. Digestion
Rationale: Digestion involves mechanical and chemical breakdown of food.
11.
Which macronutrient contains nitrogen?
A. Carbohydrates
B. Fat
C. Protein
D. Fiber
Answer: C. Protein
Rationale: Proteins are made of amino acids that contain nitrogen.
12.
