BIOD 152 Essentials of Nutrition Midterm Exam Practice
Questions and Detailed Solutions Latest Update 2026/2027 |
Nutritional Assessment, Diet Therapy, Verified Answers - 190
Questions
This midterm examination assesses advanced understanding of nutritional science, including macronutrient
metabolism, micronutrient functions, nutritional assessment methodologies, and evidence-based diet therapy for
chronic conditions. Questions are designed to evaluate critical thinking, clinical reasoning, and application of
current nutritional guidelines. It contains 190 multiple-choice questions, each with four distractors and a fully
worked rationale that explains why the keyed answer is correct. Questions are organized into clearly labelled
sections that mirror the major content areas of the course. Targeted learning outcomes include: Evaluate
nutritional status using anthropometric, biochemical, clinical, and dietary methods.; Apply evidence-based
nutrition interventions for disease prevention and management.; Critically analyze the interplay between diet,
metabolism, and health outcomes.; Interpret nutritional data to formulate individualized diet therapy plans..
Every item has been reviewed for clinical accuracy, current guidelines, and clarity so that students can study with
confidence and self-correct as they work through the bank. Use it as a high-yield review immediately before the
exam, or as a structured practice tool during the unit - the rationales double as concise teaching notes. The
recommended writing time is 3 hours, with a passing score of 75%. Aligned with Meets standards of the
Accreditation Council for Education in Nutrition and Dietetics (ACEND) and typical US university rigor.
standards and reflects the question style commonly seen on accredited program examinations. Students
Section 1: General (Questions 1-190)
1 Which of the following metabolic adaptations is most characteristic
of the body's response to a prolonged fast (e.g., 72 hours), and how
does it influence nitrogen balance?
A) Increased gluconeogenesis from amino acids, leading to negative
nitrogen balance.
B) Increased ketone body production by the liver, reducing muscle
proteolysis and sparing nitrogen.
C) Complete reliance on fatty acid oxidation with no protein
catabolism.
D) Upregulation of glycogenolysis to maintain blood glucose, with
minimal effect on protein metabolism.
Answer: B
Rationale: During prolonged fasting, the liver increases ketogenesis
from fatty acids, and the brain adapts to use ketones, reducing the
need for gluconeogenesis from muscle protein. This spares nitrogen
and reduces negative nitrogen balance. Option A is true initially but
,not the most characteristic adaptation after 72 hours. Option C is false
because some protein catabolism continues. Option D is incorrect as
glycogen stores are depleted.
2 A patient presents with microcytic anemia, elevated serum ferritin,
and normal serum iron. Which of the following is the most likely
underlying cause?
A) Iron deficiency anemia
B) Anemia of chronic disease
C) Lead poisoning
D) Vitamin B12 deficiency
Answer: B
Rationale: Anemia of chronic disease is characterized by microcytic or
normocytic anemia with elevated ferritin (as an acute-phase reactant)
and low serum iron. Iron deficiency would show low ferritin. Lead
poisoning can cause microcytic anemia but ferritin is typically normal
or low. Vitamin B12 deficiency causes macrocytic anemia.
3 Which of the following best explains the differential effect of
soluble versus insoluble fiber on postprandial glycemia?
A) Soluble fiber increases the viscosity of intestinal contents,
slowing gastric emptying and glucose absorption.
B) Insoluble fiber is fermented by gut microbiota, producing
short-chain fatty acids that enhance insulin secretion.
C) Soluble fiber binds to bile acids, reducing fat absorption and
thereby lowering blood glucose.
D) Insoluble fiber forms a gel matrix that physically traps glucose
molecules, preventing their absorption.
Answer: A
Rationale: Soluble fiber (e.g., pectin, beta-glucan) forms a viscous gel
in the GI tract, which delays gastric emptying and reduces the rate of
glucose absorption, blunting postprandial glycemic spikes. Insoluble
fiber does not form such gels and has minimal effect on glycemia; its
,fermentation is not the primary mechanism. Option C is a secondary
effect but not the main mechanism; option D is incorrect because
insoluble fiber doesn't form a gel.
4 In the context of the Dietary Guidelines for Americans, what is the
primary rationale for limiting saturated fat intake to less than 10%
of total daily calories?
A) Saturated fats are not an energy source and thus should be
minimized.
B) High intake of saturated fats increases LDL cholesterol, a causal
risk factor for atherosclerotic cardiovascular disease.
C) Saturated fats are more calorically dense than unsaturated fats,
promoting weight gain.
D) Saturated fats interfere with the absorption of fat-soluble
vitamins.
Answer: B
Rationale: The primary evidence-based reason is that saturated fatty
acids raise LDL cholesterol, which is a well-established causal risk
factor for cardiovascular disease. While saturated fats are
energy-dense, the calorie density is similar to unsaturated fats (9
kcal/g). They do not interfere with vitamin absorption more than other
fats, and they are indeed an energy source.
5 Which of the following combinations of biomarkers is most
consistent with a diagnosis of protein-energy malnutrition (PEM) in
the absence of inflammation?
A) Low serum albumin, low prealbumin, and low transferrin.
B) Low serum albumin, high C-reactive protein, and low total
iron-binding capacity.
C) Normal serum albumin, low prealbumin, and high C-reactive
protein.
D) Low serum albumin, high prealbumin, and low transferrin.
Answer: A
, Rationale: PEM without inflammation leads to decreased hepatic
synthesis of visceral proteins, including albumin, prealbumin, and
transferrin. Inflammatory states (high CRP) can also lower these
proteins due to the acute-phase response, making them less reliable.
Option B includes high CRP, indicating inflammation. Option C
shows normal albumin, which is not typical in PEM. Option D shows
high prealbumin, which is inconsistent.
6 A patient with chronic kidney disease (CKD) stage 4 is prescribed a
renal diet. Which of the following dietary adjustments is most
appropriate to slow disease progression?
A) High-protein diet to maintain muscle mass.
B) Restriction of dietary phosphorus to 800-1000 mg/day.
C) Liberal potassium intake to prevent hypokalemia.
D) Increased sodium intake to manage blood pressure.
Answer: B
Rationale: In CKD, restricting phosphorus (often 800-1000 mg/day) is
recommended to prevent hyperphosphatemia, secondary
hyperparathyroidism, and vascular calcification, which can worsen
renal function. High protein intake increases renal workload and is not
advised. Potassium is usually restricted (not liberalized) to avoid
hyperkalemia. Sodium restriction is recommended, not increased.
7 Which of the following best describes the role of the microbiome in
the synthesis of short-chain fatty acids (SCFAs) and their effect on
colonic health?
A) Gut bacteria ferment resistant starch and fiber to produce
butyrate, which serves as the primary energy source for colonocytes
and promotes mucosal integrity.
B) Gut bacteria synthesize SCFAs from amino acids, which are
absorbed and used for gluconeogenesis.
C) SCFAs are produced exclusively by the small intestine and are
absorbed in the colon.
Questions and Detailed Solutions Latest Update 2026/2027 |
Nutritional Assessment, Diet Therapy, Verified Answers - 190
Questions
This midterm examination assesses advanced understanding of nutritional science, including macronutrient
metabolism, micronutrient functions, nutritional assessment methodologies, and evidence-based diet therapy for
chronic conditions. Questions are designed to evaluate critical thinking, clinical reasoning, and application of
current nutritional guidelines. It contains 190 multiple-choice questions, each with four distractors and a fully
worked rationale that explains why the keyed answer is correct. Questions are organized into clearly labelled
sections that mirror the major content areas of the course. Targeted learning outcomes include: Evaluate
nutritional status using anthropometric, biochemical, clinical, and dietary methods.; Apply evidence-based
nutrition interventions for disease prevention and management.; Critically analyze the interplay between diet,
metabolism, and health outcomes.; Interpret nutritional data to formulate individualized diet therapy plans..
Every item has been reviewed for clinical accuracy, current guidelines, and clarity so that students can study with
confidence and self-correct as they work through the bank. Use it as a high-yield review immediately before the
exam, or as a structured practice tool during the unit - the rationales double as concise teaching notes. The
recommended writing time is 3 hours, with a passing score of 75%. Aligned with Meets standards of the
Accreditation Council for Education in Nutrition and Dietetics (ACEND) and typical US university rigor.
standards and reflects the question style commonly seen on accredited program examinations. Students
Section 1: General (Questions 1-190)
1 Which of the following metabolic adaptations is most characteristic
of the body's response to a prolonged fast (e.g., 72 hours), and how
does it influence nitrogen balance?
A) Increased gluconeogenesis from amino acids, leading to negative
nitrogen balance.
B) Increased ketone body production by the liver, reducing muscle
proteolysis and sparing nitrogen.
C) Complete reliance on fatty acid oxidation with no protein
catabolism.
D) Upregulation of glycogenolysis to maintain blood glucose, with
minimal effect on protein metabolism.
Answer: B
Rationale: During prolonged fasting, the liver increases ketogenesis
from fatty acids, and the brain adapts to use ketones, reducing the
need for gluconeogenesis from muscle protein. This spares nitrogen
and reduces negative nitrogen balance. Option A is true initially but
,not the most characteristic adaptation after 72 hours. Option C is false
because some protein catabolism continues. Option D is incorrect as
glycogen stores are depleted.
2 A patient presents with microcytic anemia, elevated serum ferritin,
and normal serum iron. Which of the following is the most likely
underlying cause?
A) Iron deficiency anemia
B) Anemia of chronic disease
C) Lead poisoning
D) Vitamin B12 deficiency
Answer: B
Rationale: Anemia of chronic disease is characterized by microcytic or
normocytic anemia with elevated ferritin (as an acute-phase reactant)
and low serum iron. Iron deficiency would show low ferritin. Lead
poisoning can cause microcytic anemia but ferritin is typically normal
or low. Vitamin B12 deficiency causes macrocytic anemia.
3 Which of the following best explains the differential effect of
soluble versus insoluble fiber on postprandial glycemia?
A) Soluble fiber increases the viscosity of intestinal contents,
slowing gastric emptying and glucose absorption.
B) Insoluble fiber is fermented by gut microbiota, producing
short-chain fatty acids that enhance insulin secretion.
C) Soluble fiber binds to bile acids, reducing fat absorption and
thereby lowering blood glucose.
D) Insoluble fiber forms a gel matrix that physically traps glucose
molecules, preventing their absorption.
Answer: A
Rationale: Soluble fiber (e.g., pectin, beta-glucan) forms a viscous gel
in the GI tract, which delays gastric emptying and reduces the rate of
glucose absorption, blunting postprandial glycemic spikes. Insoluble
fiber does not form such gels and has minimal effect on glycemia; its
,fermentation is not the primary mechanism. Option C is a secondary
effect but not the main mechanism; option D is incorrect because
insoluble fiber doesn't form a gel.
4 In the context of the Dietary Guidelines for Americans, what is the
primary rationale for limiting saturated fat intake to less than 10%
of total daily calories?
A) Saturated fats are not an energy source and thus should be
minimized.
B) High intake of saturated fats increases LDL cholesterol, a causal
risk factor for atherosclerotic cardiovascular disease.
C) Saturated fats are more calorically dense than unsaturated fats,
promoting weight gain.
D) Saturated fats interfere with the absorption of fat-soluble
vitamins.
Answer: B
Rationale: The primary evidence-based reason is that saturated fatty
acids raise LDL cholesterol, which is a well-established causal risk
factor for cardiovascular disease. While saturated fats are
energy-dense, the calorie density is similar to unsaturated fats (9
kcal/g). They do not interfere with vitamin absorption more than other
fats, and they are indeed an energy source.
5 Which of the following combinations of biomarkers is most
consistent with a diagnosis of protein-energy malnutrition (PEM) in
the absence of inflammation?
A) Low serum albumin, low prealbumin, and low transferrin.
B) Low serum albumin, high C-reactive protein, and low total
iron-binding capacity.
C) Normal serum albumin, low prealbumin, and high C-reactive
protein.
D) Low serum albumin, high prealbumin, and low transferrin.
Answer: A
, Rationale: PEM without inflammation leads to decreased hepatic
synthesis of visceral proteins, including albumin, prealbumin, and
transferrin. Inflammatory states (high CRP) can also lower these
proteins due to the acute-phase response, making them less reliable.
Option B includes high CRP, indicating inflammation. Option C
shows normal albumin, which is not typical in PEM. Option D shows
high prealbumin, which is inconsistent.
6 A patient with chronic kidney disease (CKD) stage 4 is prescribed a
renal diet. Which of the following dietary adjustments is most
appropriate to slow disease progression?
A) High-protein diet to maintain muscle mass.
B) Restriction of dietary phosphorus to 800-1000 mg/day.
C) Liberal potassium intake to prevent hypokalemia.
D) Increased sodium intake to manage blood pressure.
Answer: B
Rationale: In CKD, restricting phosphorus (often 800-1000 mg/day) is
recommended to prevent hyperphosphatemia, secondary
hyperparathyroidism, and vascular calcification, which can worsen
renal function. High protein intake increases renal workload and is not
advised. Potassium is usually restricted (not liberalized) to avoid
hyperkalemia. Sodium restriction is recommended, not increased.
7 Which of the following best describes the role of the microbiome in
the synthesis of short-chain fatty acids (SCFAs) and their effect on
colonic health?
A) Gut bacteria ferment resistant starch and fiber to produce
butyrate, which serves as the primary energy source for colonocytes
and promotes mucosal integrity.
B) Gut bacteria synthesize SCFAs from amino acids, which are
absorbed and used for gluconeogenesis.
C) SCFAs are produced exclusively by the small intestine and are
absorbed in the colon.
