Nutrition Problems Exam with 200 Questions and Answers |
Updated 2026 A+ | Instant Download PDF
Table of Contents
1. Protein-Energy Malnutrition and Micronutrient Deficiencies
2. Clinical Assessment and Biochemical Diagnostics
3. Pathophysiology of Metabolic Disorders
4. Nutritional Interventions and Therapeutic Management
1. A patient presents with generalized edema, severe muscle wasting, and hepatomegaly, but
maintains a relatively preserved subcutaneous fat layer. Which primary pathological
mechanism underlies this clinical presentation?
A. Chronic caloric deficiency leading to total energy exhaustion
B. Inadequate dietary protein intake relative to energy intake causing hypoalbuminemia and fluid
shifts
C. Excessive hepatic glycogen accumulation due to pancreatic enzyme deficiency
D. Severe lipid malabsorption resulting in essential fatty acid and fluid retention
Answer: B
Rationale: Kwashiorkor is characterized by a primary protein deficiency that leads to decreased
hepatic synthesis of albumin, lowered oncotic pressure, and subsequent third-spacing of fluids.
2. A 45-year-old chronic alcoholic develops symmetrical peripheral neuropathy,
ophthalmoplegia, and ataxia. Which biochemical pathway is most directly impaired by the
underlying nutritional deficiency?
A. Beta-oxidation of long-chain fatty acids in the mitochondria
B. Thiamine-dependent oxidative decarboxylation and transketolase reactions in energy
metabolism
C. Nicotinamide adenine dinucleotide phosphate reduction in hepatic tissue
D. Hydroxylation of proline residues during collagen fiber cross-linking
Answer: B
Rationale: Wernicke-Korsakoff syndrome stems from a vitamin B1 deficiency which cripples key
enzymes like transketolase and pyruvate dehydrogenase essential for central nervous system glucose
metabolism.
, 3. Which of the following laboratory parameters is the most reliable short-term biomarker for
evaluating the immediate efficacy of nutritional support in a catabolic patient due to its
rapid half-life?
A. Serum albumin
B. Total iron-binding capacity
C. Transthyretin (Prealbumin)
D. Serum transferrin
Answer: C
Rationale: Prealbumin has a short half-life of approximately two days, making it highly sensitive to
acute changes in protein-energy status compared to albumin.
4. A toddler in a resource-limited setting presents with growth retardation, dry scaly skin, Bitot
spots, and recurrent respiratory infections. Which fat-soluble vitamin deficiency is the
primary cause of the ocular findings?
A. Vitamin D
B. Vitamin E
C. Vitamin A
D. Vitamin K
Answer: C
Rationale: Vitamin A is critical for maintaining differentiated epithelial tissues and corneal integrity,
and its deficiency leads to conjunctival drying and characteristic Bitot spots.
5. A patient with severe Crohn disease involving the terminal ileum exhibits megaloblastic
anemia alongside normal serum folate levels. What is the precise pathophysiological defect
causing this hematological finding?
A. Failure of intrinsic factor secretion by gastric parietal cells
B. Impaired receptor-mediated absorption of the cobalamin-intrinsic factor complex
C. Accelerated renal clearance of unbound circulating cyanocobalamin
D. Decreased hepatic storage capacity for methylcobalamin coenzymes
Answer: B
Rationale: The terminal ileum is the exclusive site for absorbing the vitamin B12-intrinsic factor
complex, meaning regional ileal disease directly causes cobalamin malabsorption and megaloblastic
anemia.
, 6. During refeeding syndrome in a severely malnourished patient, an abrupt intracellular shift
of which major electrolyte precipitates acute cardiac arrhythmias and respiratory failure?
A. Sodium
B. Calcium
C. Chloride
D. Phosphorus
Answer: D
Rationale: Insulin surges driven by carbohydrate reintroduction stimulate cellular uptake of
phosphate, rapidly depleting serum levels and causing life-threatening hypophosphatemia.
7. A patient with advanced chronic kidney disease presents with renal osteodystrophy, bone
pain, and secondary hyperparathyroidism. Which active hormonal form is deficient due to
compromised renal parenchymal function?
A. 25-hydroxycholecalciferol
B. 1,25-dihydroxycholecalciferol
C. 24,25-dihydroxycholecalciferol
D. Cholecalciferol sulfate
Answer: B
Rationale: The kidney is responsible for the final 1-alpha hydroxylation step required to convert 25-
hydroxyvitamin D into the active hormonal form calcitriol.
8. An infant fed exclusively on unfortified goat's milk develops a severe macrocytic anemia that
responds poorly to standard iron therapy. Which underlying nutrient deficiency is most likely
responsible?
A. Ascorbic acid
B. Pyridoxine
C. Folate
D. Cobalamin
Answer: C
Rationale: Goat's milk is notoriously deficient in folic acid, predisposing infants fed exclusively on it to
megaloblastic anemia.
9. Which physical sign is classically associated with severe vitamin C deficiency (scurvy)
resulting from defective collagen synthesis?
, A. Koilonychia
B. Perifollicular hemorrhages and petechiae
C. Trousseau sign of latent tetany
D. Cheilosis and angular stomatitis
Answer: B
Rationale: Ascorbic acid is required for the hydroxylation of proline and lysine in collagen; its
deficiency weakens capillary walls, causing perifollicular hemorrhages and ecchymoses.
10. A patient presents with night blindness and xerophthalmia following bariatric surgery. Which
pathophysiological mechanism best explains this micronutrient complication?
A. Decreased gastric acid production impairing mineral ionization
B. Surgical bypass of the proximal small intestine where fat-soluble vitamins are primarily
absorbed
C. Accelerated phase-II hepatic conjugation and biliary excretion
D. Competitive inhibition of intestinal transporters by unabsorbed bile acids
Answer: B
Rationale: Bariatric procedures like the Roux-en-Y bypass exclude the duodenum and proximal
jejunum, drastically reducing the absorption surface area for fat-soluble vitamins such as vitamin A.
11. Which clinical manifestation distinguishes severe marasmus from kwashiorkor in pediatric
protein-energy malnutrition?
A. Pronounced pitting edema of the lower extremities
B. Severe depletion of subcutaneous fat and muscle mass without edema
C. Desquamating skin rash with a "paint-nylons" appearance
D. Significant hepatomegaly due to fatty acid infiltration
Answer: B
Rationale: Marasmus represents an adaptation to severe energy and protein deprivation, resulting in
extreme emaciation and muscle wasting without the characteristic edema seen in kwashiorkor.
12. A patient with long-term total parenteral nutrition (TPN) without adequate trace element
supplementation develops impaired wound healing, alopecia, and a pustular dermatitis
around the mouth and extremities. Which mineral is deficient?
A. Selenium
B. Copper
Updated 2026 A+ | Instant Download PDF
Table of Contents
1. Protein-Energy Malnutrition and Micronutrient Deficiencies
2. Clinical Assessment and Biochemical Diagnostics
3. Pathophysiology of Metabolic Disorders
4. Nutritional Interventions and Therapeutic Management
1. A patient presents with generalized edema, severe muscle wasting, and hepatomegaly, but
maintains a relatively preserved subcutaneous fat layer. Which primary pathological
mechanism underlies this clinical presentation?
A. Chronic caloric deficiency leading to total energy exhaustion
B. Inadequate dietary protein intake relative to energy intake causing hypoalbuminemia and fluid
shifts
C. Excessive hepatic glycogen accumulation due to pancreatic enzyme deficiency
D. Severe lipid malabsorption resulting in essential fatty acid and fluid retention
Answer: B
Rationale: Kwashiorkor is characterized by a primary protein deficiency that leads to decreased
hepatic synthesis of albumin, lowered oncotic pressure, and subsequent third-spacing of fluids.
2. A 45-year-old chronic alcoholic develops symmetrical peripheral neuropathy,
ophthalmoplegia, and ataxia. Which biochemical pathway is most directly impaired by the
underlying nutritional deficiency?
A. Beta-oxidation of long-chain fatty acids in the mitochondria
B. Thiamine-dependent oxidative decarboxylation and transketolase reactions in energy
metabolism
C. Nicotinamide adenine dinucleotide phosphate reduction in hepatic tissue
D. Hydroxylation of proline residues during collagen fiber cross-linking
Answer: B
Rationale: Wernicke-Korsakoff syndrome stems from a vitamin B1 deficiency which cripples key
enzymes like transketolase and pyruvate dehydrogenase essential for central nervous system glucose
metabolism.
, 3. Which of the following laboratory parameters is the most reliable short-term biomarker for
evaluating the immediate efficacy of nutritional support in a catabolic patient due to its
rapid half-life?
A. Serum albumin
B. Total iron-binding capacity
C. Transthyretin (Prealbumin)
D. Serum transferrin
Answer: C
Rationale: Prealbumin has a short half-life of approximately two days, making it highly sensitive to
acute changes in protein-energy status compared to albumin.
4. A toddler in a resource-limited setting presents with growth retardation, dry scaly skin, Bitot
spots, and recurrent respiratory infections. Which fat-soluble vitamin deficiency is the
primary cause of the ocular findings?
A. Vitamin D
B. Vitamin E
C. Vitamin A
D. Vitamin K
Answer: C
Rationale: Vitamin A is critical for maintaining differentiated epithelial tissues and corneal integrity,
and its deficiency leads to conjunctival drying and characteristic Bitot spots.
5. A patient with severe Crohn disease involving the terminal ileum exhibits megaloblastic
anemia alongside normal serum folate levels. What is the precise pathophysiological defect
causing this hematological finding?
A. Failure of intrinsic factor secretion by gastric parietal cells
B. Impaired receptor-mediated absorption of the cobalamin-intrinsic factor complex
C. Accelerated renal clearance of unbound circulating cyanocobalamin
D. Decreased hepatic storage capacity for methylcobalamin coenzymes
Answer: B
Rationale: The terminal ileum is the exclusive site for absorbing the vitamin B12-intrinsic factor
complex, meaning regional ileal disease directly causes cobalamin malabsorption and megaloblastic
anemia.
, 6. During refeeding syndrome in a severely malnourished patient, an abrupt intracellular shift
of which major electrolyte precipitates acute cardiac arrhythmias and respiratory failure?
A. Sodium
B. Calcium
C. Chloride
D. Phosphorus
Answer: D
Rationale: Insulin surges driven by carbohydrate reintroduction stimulate cellular uptake of
phosphate, rapidly depleting serum levels and causing life-threatening hypophosphatemia.
7. A patient with advanced chronic kidney disease presents with renal osteodystrophy, bone
pain, and secondary hyperparathyroidism. Which active hormonal form is deficient due to
compromised renal parenchymal function?
A. 25-hydroxycholecalciferol
B. 1,25-dihydroxycholecalciferol
C. 24,25-dihydroxycholecalciferol
D. Cholecalciferol sulfate
Answer: B
Rationale: The kidney is responsible for the final 1-alpha hydroxylation step required to convert 25-
hydroxyvitamin D into the active hormonal form calcitriol.
8. An infant fed exclusively on unfortified goat's milk develops a severe macrocytic anemia that
responds poorly to standard iron therapy. Which underlying nutrient deficiency is most likely
responsible?
A. Ascorbic acid
B. Pyridoxine
C. Folate
D. Cobalamin
Answer: C
Rationale: Goat's milk is notoriously deficient in folic acid, predisposing infants fed exclusively on it to
megaloblastic anemia.
9. Which physical sign is classically associated with severe vitamin C deficiency (scurvy)
resulting from defective collagen synthesis?
, A. Koilonychia
B. Perifollicular hemorrhages and petechiae
C. Trousseau sign of latent tetany
D. Cheilosis and angular stomatitis
Answer: B
Rationale: Ascorbic acid is required for the hydroxylation of proline and lysine in collagen; its
deficiency weakens capillary walls, causing perifollicular hemorrhages and ecchymoses.
10. A patient presents with night blindness and xerophthalmia following bariatric surgery. Which
pathophysiological mechanism best explains this micronutrient complication?
A. Decreased gastric acid production impairing mineral ionization
B. Surgical bypass of the proximal small intestine where fat-soluble vitamins are primarily
absorbed
C. Accelerated phase-II hepatic conjugation and biliary excretion
D. Competitive inhibition of intestinal transporters by unabsorbed bile acids
Answer: B
Rationale: Bariatric procedures like the Roux-en-Y bypass exclude the duodenum and proximal
jejunum, drastically reducing the absorption surface area for fat-soluble vitamins such as vitamin A.
11. Which clinical manifestation distinguishes severe marasmus from kwashiorkor in pediatric
protein-energy malnutrition?
A. Pronounced pitting edema of the lower extremities
B. Severe depletion of subcutaneous fat and muscle mass without edema
C. Desquamating skin rash with a "paint-nylons" appearance
D. Significant hepatomegaly due to fatty acid infiltration
Answer: B
Rationale: Marasmus represents an adaptation to severe energy and protein deprivation, resulting in
extreme emaciation and muscle wasting without the characteristic edema seen in kwashiorkor.
12. A patient with long-term total parenteral nutrition (TPN) without adequate trace element
supplementation develops impaired wound healing, alopecia, and a pustular dermatitis
around the mouth and extremities. Which mineral is deficient?
A. Selenium
B. Copper
