Nutrition and Diet Therapy University Final Examination
Questions and Answers with Verified Solutions
Examination Title Nutrition and Diet Therapy University Final Examination
Specialty Coverage Macronutrient Metabolism, Clinical Clinical Nutrition, Medical Nutrition
Therapy, Parenteral/Enteral Nutrition & Metabolic Disorders
Passing Standard 75% Correct Responses
Edition Specification University Master Review Edition
Module 1: Carbohydrates, Lipids & Protein Metabolism (Questions 1–15)
Question 1
Which enzyme located at the brush border of the small intestine is responsible for cleaving
sucrose into glucose and fructose?
• A) Pancreatic amylase
• B) Sucrase
• C) Lactase
• D) Maltase
Correct Answer: B) Sucrase
Sucrase is a microvillar brush border disaccharidase that hydrolyzes sucrose into its constituent
monosaccharides, glucose and fructose, enabling intestinal absorption.
Question 2
A client with type 1 diabetes mellitus develops severe ketoacidosis. Which metabolic pathway
generates ketone bodies (beta-hydroxybutyrate and acetoacetate) during prolonged
carbohydrate starvation?
• A) Hepatic glycogenesis
• B) Hepatic ketogenesis from excess acetyl-CoA produced via beta-oxidation
• C) Skeletal muscle glycolysis
• D) Intestinal chylomicron assembly
Correct Answer: B) Hepatic ketogenesis from excess acetyl-CoA produced via beta-oxidation
When carbohydrate availability is severely restricted or insulin is absent, accelerated lipolysis yields fatty
acids that undergo hepatic beta-oxidation, accumulating acetyl-CoA that condenses into ketone bodies.
Question 3
What primary lipoprotein particle transports dietary lipids absorbed from the intestinal lumen into
the lymphatic and systemic circulation?
, • A) Chylomicrons
• B) Very Low-Density Lipoproteins (VLDL)
• C) Low-Density Lipoproteins (LDL)
• D) High-Density Lipoproteins (HDL)
Correct Answer: A) Chylomicrons
Chylomicrons are synthesized by enterocytes to pack dietary triglycerides, cholesterol esters, and fat-
soluble vitamins for transport through lacteals into the systemic venous blood.
Question 4
Which amino acid is classified as conditionally essential during severe metabolic stress, critical
illness, or major thermal burn injury?
• A) Alanine
• B) Glutamine
• C) Leucine
• D) Valine
Correct Answer: B) Glutamine
Glutamine is the primary metabolic fuel for rapidly dividing enterocytes and immune cells. During
hypercatabolic stress, endogenous synthesis cannot meet demands, making it conditionally essential.
Question 5
An individual consumes a meal high in soluble dietary fiber (e.g., oats, pectin). What
physiological effect does soluble fiber exert in the gastrointestinal tract?
• A) Rapid acceleration of gastric emptying time
• B) Formation of a viscous gel that delays gastric emptying and binds bile acids to lower serum
cholesterol
• C) Complete inhibition of pancreatic lipase enzyme activity
• D) Destruction of colonic short-chain fatty acid producing bacteria
Correct Answer: B) Formation of a viscous gel that delays gastric emptying and binds bile acids to lower
serum cholesterol
Soluble fibers absorb water to form viscous gel matrices in the stomach and small intestine, slowing glucose
absorption, promoting satiety, and binding bile acids to enhance hepatic cholesterol clearance.
Question 6
Which apolipoprotein component on High-Density Lipoproteins (HDL) activates lecithin-
cholesterol acyltransferase (LCAT) to facilitate reverse cholesterol transport?
• A) Apolipoprotein A-I (Apo A-1)
• B) Apolipoprotein B-100 (Apo B-100)
• C) Apolipoprotein E (Apo E)
• D) Apolipoprotein C-II (Apo C-II)
Correct Answer: A) Apolipoprotein A-I (Apo A-1)
Apolipoprotein A-1 is the major structural protein of HDL particles; it activates LCAT to esterify free
cholesterol from peripheral tissues, driving reverse cholesterol transport to the liver.
Question 7
What clinical indicator reflects a state of negative nitrogen balance in a hospitalized critically ill
client?
Questions and Answers with Verified Solutions
Examination Title Nutrition and Diet Therapy University Final Examination
Specialty Coverage Macronutrient Metabolism, Clinical Clinical Nutrition, Medical Nutrition
Therapy, Parenteral/Enteral Nutrition & Metabolic Disorders
Passing Standard 75% Correct Responses
Edition Specification University Master Review Edition
Module 1: Carbohydrates, Lipids & Protein Metabolism (Questions 1–15)
Question 1
Which enzyme located at the brush border of the small intestine is responsible for cleaving
sucrose into glucose and fructose?
• A) Pancreatic amylase
• B) Sucrase
• C) Lactase
• D) Maltase
Correct Answer: B) Sucrase
Sucrase is a microvillar brush border disaccharidase that hydrolyzes sucrose into its constituent
monosaccharides, glucose and fructose, enabling intestinal absorption.
Question 2
A client with type 1 diabetes mellitus develops severe ketoacidosis. Which metabolic pathway
generates ketone bodies (beta-hydroxybutyrate and acetoacetate) during prolonged
carbohydrate starvation?
• A) Hepatic glycogenesis
• B) Hepatic ketogenesis from excess acetyl-CoA produced via beta-oxidation
• C) Skeletal muscle glycolysis
• D) Intestinal chylomicron assembly
Correct Answer: B) Hepatic ketogenesis from excess acetyl-CoA produced via beta-oxidation
When carbohydrate availability is severely restricted or insulin is absent, accelerated lipolysis yields fatty
acids that undergo hepatic beta-oxidation, accumulating acetyl-CoA that condenses into ketone bodies.
Question 3
What primary lipoprotein particle transports dietary lipids absorbed from the intestinal lumen into
the lymphatic and systemic circulation?
, • A) Chylomicrons
• B) Very Low-Density Lipoproteins (VLDL)
• C) Low-Density Lipoproteins (LDL)
• D) High-Density Lipoproteins (HDL)
Correct Answer: A) Chylomicrons
Chylomicrons are synthesized by enterocytes to pack dietary triglycerides, cholesterol esters, and fat-
soluble vitamins for transport through lacteals into the systemic venous blood.
Question 4
Which amino acid is classified as conditionally essential during severe metabolic stress, critical
illness, or major thermal burn injury?
• A) Alanine
• B) Glutamine
• C) Leucine
• D) Valine
Correct Answer: B) Glutamine
Glutamine is the primary metabolic fuel for rapidly dividing enterocytes and immune cells. During
hypercatabolic stress, endogenous synthesis cannot meet demands, making it conditionally essential.
Question 5
An individual consumes a meal high in soluble dietary fiber (e.g., oats, pectin). What
physiological effect does soluble fiber exert in the gastrointestinal tract?
• A) Rapid acceleration of gastric emptying time
• B) Formation of a viscous gel that delays gastric emptying and binds bile acids to lower serum
cholesterol
• C) Complete inhibition of pancreatic lipase enzyme activity
• D) Destruction of colonic short-chain fatty acid producing bacteria
Correct Answer: B) Formation of a viscous gel that delays gastric emptying and binds bile acids to lower
serum cholesterol
Soluble fibers absorb water to form viscous gel matrices in the stomach and small intestine, slowing glucose
absorption, promoting satiety, and binding bile acids to enhance hepatic cholesterol clearance.
Question 6
Which apolipoprotein component on High-Density Lipoproteins (HDL) activates lecithin-
cholesterol acyltransferase (LCAT) to facilitate reverse cholesterol transport?
• A) Apolipoprotein A-I (Apo A-1)
• B) Apolipoprotein B-100 (Apo B-100)
• C) Apolipoprotein E (Apo E)
• D) Apolipoprotein C-II (Apo C-II)
Correct Answer: A) Apolipoprotein A-I (Apo A-1)
Apolipoprotein A-1 is the major structural protein of HDL particles; it activates LCAT to esterify free
cholesterol from peripheral tissues, driving reverse cholesterol transport to the liver.
Question 7
What clinical indicator reflects a state of negative nitrogen balance in a hospitalized critically ill
client?
