DHN 101 EXAM 1 ACTUAL EXAM – QUESTIONS AND ANSWERS | VERIFIED
AND WELL DETAILED ANSWERS | PLUS RATIONALES | DOWNLOAD AND
PASS | LATEST EXAM UPDATE 2026/2027
Core Domains
Nutrition Science Foundations
Macronutrient Metabolism
Micronutrient Function and Deficiency
Dietary Guidelines and Policy
Nutrition Across the Lifespan
Clinical Nutrition and Disease Management
Nutritional Assessment and Counseling
Food Safety and Regulatory Compliance
Professional Ethics in Dietetics
Introduction
This comprehensive examination is designed to rigorously assess your
foundational knowledge and applied skills in the core principles of nutrition
science. It evaluates your understanding of macronutrient and micronutrient
metabolism, their roles in health and disease, and the application of dietary
guidelines across diverse populations. The exam employs a combination of
direct knowledge-based and scenario-based multiple-choice questions to test
your ability to recall key facts and apply critical thinking to real-world
professional situations. A strong emphasis is placed on decision-making,
ethical considerations, and the practical translation of scientific evidence into
effective nutritional guidance. Success on this exam demonstrates a robust
and exam-ready proficiency essential for advanced study and professional
practice.
,Section One: Questions 1 – 50
1. Which of the following is the primary function of carbohydrates in the
human diet?
A. Building and repairing muscle tissue
B. Facilitating vitamin absorption in the small intestine
C. Providing the body's main source of energy
D. Regulating body temperature and fluid balance
🟢 Correct Answer: C. Providing the body's main source of energy
🔴 Explanation: Carbohydrates are the body's preferred and most readily
available source of energy. They are broken down into glucose, which fuels
cellular activities and is particularly critical for brain function. Proteins are
primarily for building tissue (A), fats aid in vitamin absorption (B), and
water/electrolytes regulate temperature and fluid balance (D).
2. A nutrition professional is conducting a dietary assessment. Which of
the following methods is considered the most accurate for measuring an
individual's long-term dietary intake?
A. 24-hour dietary recall
B. Food frequency questionnaire (FFQ)
C. Diet history interview
D. Three-day food record
🟢 Correct Answer: D. Three-day food record
🔴 Explanation: While all methods are used, a multiple-day food record
(typically 3-7 days) is often considered one of the most accurate for
assessing "usual" intake as it records actual consumption in real-time,
reducing recall bias. A 24-hour recall (A) is quick but subject to memory
,error, a FFQ (B) provides a broad overview of usual intake but can be less
precise for specific quantities, and a diet history interview (C) provides a
comprehensive picture of long-term patterns but is more subjective and
time-consuming.
3. During a counseling session, a client asks about the health benefits of
omega-3 fatty acids. Which of the following is a well-documented benefit
of these essential fats?
A. Increased LDL cholesterol levels
B. Reduced risk of cardiovascular disease
C. Elevated blood triglyceride levels
D. Decreased cognitive function
🟢 Correct Answer: B. Reduced risk of cardiovascular disease
🔴 Explanation: Omega-3 fatty acids (EPA and DHA) are well-documented
for their cardioprotective effects, including lowering triglycerides, reducing
blood pressure, and decreasing inflammation, thereby reducing the risk of
cardiovascular disease. They do not increase LDL (A), lower triglycerides (C),
or decrease cognitive function (D); rather, they support brain health.
4. Which of the following organs is primarily responsible for the majority
of nutrient absorption?
A. Stomach
B. Large intestine
C. Small intestine
D. Liver
🟢 Correct Answer: C. Small intestine
🔴 Explanation: The small intestine is the primary site for nutrient digestion
and absorption. Its structure, with villi and microvilli, provides a massive
, surface area for absorption. The stomach (A) is mainly for digestion, the
large intestine (B) absorbs water and electrolytes, and the liver (D) is
involved in processing nutrients.
5. The Acceptable Macronutrient Distribution Range (AMDR) for total fat
intake in adults is:
A. 10-15% of total calories
B. 20-35% of total calories
C. 45-65% of total calories
D. 10-35% of total calories
🟢 Correct Answer: B. 20-35% of total calories
🔴 Explanation: The AMDR for fat is set at 20-35% to ensure adequate
intake of essential fatty acids and fat-soluble vitamins while minimizing the
risk of chronic disease. The range for carbohydrates is 45-65% (C), and for
protein, it is 10-35% (D). Option A is too low for total fat intake.
6. A vegan client is at risk for a deficiency of which vitamin, which is
primarily found in animal products?
A. Vitamin C
B. Vitamin B12
C. Vitamin B6
D. Vitamin E
🟢 Correct Answer: B. Vitamin B12
🔴 Explanation: Vitamin B12 is naturally found in significant amounts only
in animal products such as meat, poultry, fish, eggs, and dairy. Vegans, who
exclude all animal products, are at high risk for deficiency and require
fortified foods or supplements. Vitamins C (A), B6 (C), and E (D) are
abundant in plant-based foods.
AND WELL DETAILED ANSWERS | PLUS RATIONALES | DOWNLOAD AND
PASS | LATEST EXAM UPDATE 2026/2027
Core Domains
Nutrition Science Foundations
Macronutrient Metabolism
Micronutrient Function and Deficiency
Dietary Guidelines and Policy
Nutrition Across the Lifespan
Clinical Nutrition and Disease Management
Nutritional Assessment and Counseling
Food Safety and Regulatory Compliance
Professional Ethics in Dietetics
Introduction
This comprehensive examination is designed to rigorously assess your
foundational knowledge and applied skills in the core principles of nutrition
science. It evaluates your understanding of macronutrient and micronutrient
metabolism, their roles in health and disease, and the application of dietary
guidelines across diverse populations. The exam employs a combination of
direct knowledge-based and scenario-based multiple-choice questions to test
your ability to recall key facts and apply critical thinking to real-world
professional situations. A strong emphasis is placed on decision-making,
ethical considerations, and the practical translation of scientific evidence into
effective nutritional guidance. Success on this exam demonstrates a robust
and exam-ready proficiency essential for advanced study and professional
practice.
,Section One: Questions 1 – 50
1. Which of the following is the primary function of carbohydrates in the
human diet?
A. Building and repairing muscle tissue
B. Facilitating vitamin absorption in the small intestine
C. Providing the body's main source of energy
D. Regulating body temperature and fluid balance
🟢 Correct Answer: C. Providing the body's main source of energy
🔴 Explanation: Carbohydrates are the body's preferred and most readily
available source of energy. They are broken down into glucose, which fuels
cellular activities and is particularly critical for brain function. Proteins are
primarily for building tissue (A), fats aid in vitamin absorption (B), and
water/electrolytes regulate temperature and fluid balance (D).
2. A nutrition professional is conducting a dietary assessment. Which of
the following methods is considered the most accurate for measuring an
individual's long-term dietary intake?
A. 24-hour dietary recall
B. Food frequency questionnaire (FFQ)
C. Diet history interview
D. Three-day food record
🟢 Correct Answer: D. Three-day food record
🔴 Explanation: While all methods are used, a multiple-day food record
(typically 3-7 days) is often considered one of the most accurate for
assessing "usual" intake as it records actual consumption in real-time,
reducing recall bias. A 24-hour recall (A) is quick but subject to memory
,error, a FFQ (B) provides a broad overview of usual intake but can be less
precise for specific quantities, and a diet history interview (C) provides a
comprehensive picture of long-term patterns but is more subjective and
time-consuming.
3. During a counseling session, a client asks about the health benefits of
omega-3 fatty acids. Which of the following is a well-documented benefit
of these essential fats?
A. Increased LDL cholesterol levels
B. Reduced risk of cardiovascular disease
C. Elevated blood triglyceride levels
D. Decreased cognitive function
🟢 Correct Answer: B. Reduced risk of cardiovascular disease
🔴 Explanation: Omega-3 fatty acids (EPA and DHA) are well-documented
for their cardioprotective effects, including lowering triglycerides, reducing
blood pressure, and decreasing inflammation, thereby reducing the risk of
cardiovascular disease. They do not increase LDL (A), lower triglycerides (C),
or decrease cognitive function (D); rather, they support brain health.
4. Which of the following organs is primarily responsible for the majority
of nutrient absorption?
A. Stomach
B. Large intestine
C. Small intestine
D. Liver
🟢 Correct Answer: C. Small intestine
🔴 Explanation: The small intestine is the primary site for nutrient digestion
and absorption. Its structure, with villi and microvilli, provides a massive
, surface area for absorption. The stomach (A) is mainly for digestion, the
large intestine (B) absorbs water and electrolytes, and the liver (D) is
involved in processing nutrients.
5. The Acceptable Macronutrient Distribution Range (AMDR) for total fat
intake in adults is:
A. 10-15% of total calories
B. 20-35% of total calories
C. 45-65% of total calories
D. 10-35% of total calories
🟢 Correct Answer: B. 20-35% of total calories
🔴 Explanation: The AMDR for fat is set at 20-35% to ensure adequate
intake of essential fatty acids and fat-soluble vitamins while minimizing the
risk of chronic disease. The range for carbohydrates is 45-65% (C), and for
protein, it is 10-35% (D). Option A is too low for total fat intake.
6. A vegan client is at risk for a deficiency of which vitamin, which is
primarily found in animal products?
A. Vitamin C
B. Vitamin B12
C. Vitamin B6
D. Vitamin E
🟢 Correct Answer: B. Vitamin B12
🔴 Explanation: Vitamin B12 is naturally found in significant amounts only
in animal products such as meat, poultry, fish, eggs, and dairy. Vegans, who
exclude all animal products, are at high risk for deficiency and require
fortified foods or supplements. Vitamins C (A), B6 (C), and E (D) are
abundant in plant-based foods.
