BIOD 121 NUTRITION FINAL EXAM – PRACTICE QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF.
CORE DOMAINS
Macronutrient Metabolism and Energy Balance
Micronutrient Functions and Deficiency Syndromes
Digestive Anatomy and Physiology
Nutrition Through the Lifespan
Clinical Nutrition and Medical Nutrition Therapy
Weight Management and Eating Disorders
Food Safety and Regulatory Standards
Community Nutrition and Public Health
INTRODUCTION
The BIOD 121 Nutrition Final Exam Practice Assessment is designed to provide a
comprehensive evaluation of a student's mastery over fundamental and advanced nutritional
sciences. This examination assesses a broad spectrum of competencies, ranging from the
biochemical pathways of metabolism to the practical application of clinical dietetics. Through a
rigorous series of multiple-choice and scenario-based questions, candidates must demonstrate
critical thinking and evidence-based decision-making. The assessment emphasizes real-world
application, ensuring that learners can translate theoretical caloric and micronutrient
requirements into actionable health interventions across diverse populations and clinical settings,
maintaining the highest professional and ethical standards.
SECTION ONE: QUESTIONS 1–100
, 1. Which of the following organs is the primary site for the absorption of most nutrients in the
gastrointestinal tract?
A. Stomach
B. Large Intestine
🟢 C. Small Intestine
D. Esophagus
🔴 RATIONALE: The small intestine, specifically the jejunum and ileum, possesses a vast
surface area due to villi and microvilli, making it the primary site for nutrient absorption.
2. A patient presents with scaling skin and impaired night vision. Which vitamin deficiency is
most likely responsible for these symptoms?
🟢 A. Vitamin A
B. Vitamin C
C. Vitamin D
D. Vitamin K
🔴 RATIONALE: Vitamin A (retinol) is essential for maintaining the health of epithelial tissues
and the formation of rhodopsin for vision in dim light.
3. Which macronutrient provides 9 calories per gram?
A. Carbohydrates
B. Proteins
🟢 C. Fats
D. Alcohol
🔴 RATIONALE: Lipids are the most energy-dense macronutrient, providing 9 kcal/g, whereas
carbohydrates and proteins provide 4 kcal/g.
4. The process of breaking down glycogen into glucose to maintain blood sugar levels is
known as:
,A. Glycolysis
🟢 B. Glycogenolysis
C. Gluconeogenesis
D. Glycogenesis
🔴 RATIONALE: Glycogenolysis is the specific biochemical pathway where glycogen stores in
the liver are converted back into glucose for systemic use.
5. What is the AMDR (Acceptable Macronutrient Distribution Range) for daily carbohydrate
intake in healthy adults?
A. 10-35%
B. 20-35%
🟢 C. 45-65%
D. 50-70%
🔴 RATIONALE: Health guidelines recommend that 45% to 65% of total daily caloric intake
should come from carbohydrates to ensure adequate glucose for the brain and muscles.
6. Which enzyme is responsible for the initial digestion of starches in the oral cavity?
A. Pepsin
B. Lipase
🟢 C. Salivary amylase
D. Trypsin
🔴 RATIONALE: Salivary amylase begins the chemical breakdown of complex carbohydrates
into maltose while food is still in the mouth.
7. A patient with Celiac disease must strictly avoid which of the following proteins?
A. Casein
🟢 B. Gluten
, C. Albumin
D. Whey
🔴 RATIONALE: Celiac disease is an autoimmune disorder where the ingestion of gluten (found
in wheat, barley, and rye) leads to damage in the small intestine.
8. Which of the following is considered a "complete" protein source?
A. Lentils
B. Whole grain bread
🟢 C. Quinoa
D. Peanuts
🔴 RATIONALE: Quinoa is one of the few plant-based foods that contains all nine essential
amino acids in sufficient quantities, making it a complete protein.
9. Scurvy is a clinical manifestation of a prolonged deficiency in:
A. Thiamin
B. Vitamin B12
🟢 C. Vitamin C
D. Niacin
🔴 RATIONALE: Vitamin C is critical for collagen synthesis; without it, connective tissues
weaken, leading to the bleeding gums and bruising associated with scurvy.
10. What is the primary function of low-density lipoproteins (LDL)?
🟢 A. Transporting cholesterol to peripheral tissues
B. Transporting cholesterol back to the liver
C. Digesting dietary fats in the small intestine
D. Storing triglycerides in adipose tissue
(VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF.
CORE DOMAINS
Macronutrient Metabolism and Energy Balance
Micronutrient Functions and Deficiency Syndromes
Digestive Anatomy and Physiology
Nutrition Through the Lifespan
Clinical Nutrition and Medical Nutrition Therapy
Weight Management and Eating Disorders
Food Safety and Regulatory Standards
Community Nutrition and Public Health
INTRODUCTION
The BIOD 121 Nutrition Final Exam Practice Assessment is designed to provide a
comprehensive evaluation of a student's mastery over fundamental and advanced nutritional
sciences. This examination assesses a broad spectrum of competencies, ranging from the
biochemical pathways of metabolism to the practical application of clinical dietetics. Through a
rigorous series of multiple-choice and scenario-based questions, candidates must demonstrate
critical thinking and evidence-based decision-making. The assessment emphasizes real-world
application, ensuring that learners can translate theoretical caloric and micronutrient
requirements into actionable health interventions across diverse populations and clinical settings,
maintaining the highest professional and ethical standards.
SECTION ONE: QUESTIONS 1–100
, 1. Which of the following organs is the primary site for the absorption of most nutrients in the
gastrointestinal tract?
A. Stomach
B. Large Intestine
🟢 C. Small Intestine
D. Esophagus
🔴 RATIONALE: The small intestine, specifically the jejunum and ileum, possesses a vast
surface area due to villi and microvilli, making it the primary site for nutrient absorption.
2. A patient presents with scaling skin and impaired night vision. Which vitamin deficiency is
most likely responsible for these symptoms?
🟢 A. Vitamin A
B. Vitamin C
C. Vitamin D
D. Vitamin K
🔴 RATIONALE: Vitamin A (retinol) is essential for maintaining the health of epithelial tissues
and the formation of rhodopsin for vision in dim light.
3. Which macronutrient provides 9 calories per gram?
A. Carbohydrates
B. Proteins
🟢 C. Fats
D. Alcohol
🔴 RATIONALE: Lipids are the most energy-dense macronutrient, providing 9 kcal/g, whereas
carbohydrates and proteins provide 4 kcal/g.
4. The process of breaking down glycogen into glucose to maintain blood sugar levels is
known as:
,A. Glycolysis
🟢 B. Glycogenolysis
C. Gluconeogenesis
D. Glycogenesis
🔴 RATIONALE: Glycogenolysis is the specific biochemical pathway where glycogen stores in
the liver are converted back into glucose for systemic use.
5. What is the AMDR (Acceptable Macronutrient Distribution Range) for daily carbohydrate
intake in healthy adults?
A. 10-35%
B. 20-35%
🟢 C. 45-65%
D. 50-70%
🔴 RATIONALE: Health guidelines recommend that 45% to 65% of total daily caloric intake
should come from carbohydrates to ensure adequate glucose for the brain and muscles.
6. Which enzyme is responsible for the initial digestion of starches in the oral cavity?
A. Pepsin
B. Lipase
🟢 C. Salivary amylase
D. Trypsin
🔴 RATIONALE: Salivary amylase begins the chemical breakdown of complex carbohydrates
into maltose while food is still in the mouth.
7. A patient with Celiac disease must strictly avoid which of the following proteins?
A. Casein
🟢 B. Gluten
, C. Albumin
D. Whey
🔴 RATIONALE: Celiac disease is an autoimmune disorder where the ingestion of gluten (found
in wheat, barley, and rye) leads to damage in the small intestine.
8. Which of the following is considered a "complete" protein source?
A. Lentils
B. Whole grain bread
🟢 C. Quinoa
D. Peanuts
🔴 RATIONALE: Quinoa is one of the few plant-based foods that contains all nine essential
amino acids in sufficient quantities, making it a complete protein.
9. Scurvy is a clinical manifestation of a prolonged deficiency in:
A. Thiamin
B. Vitamin B12
🟢 C. Vitamin C
D. Niacin
🔴 RATIONALE: Vitamin C is critical for collagen synthesis; without it, connective tissues
weaken, leading to the bleeding gums and bruising associated with scurvy.
10. What is the primary function of low-density lipoproteins (LDL)?
🟢 A. Transporting cholesterol to peripheral tissues
B. Transporting cholesterol back to the liver
C. Digesting dietary fats in the small intestine
D. Storing triglycerides in adipose tissue
