Nutrition and Diet Therapy: University Final Exam Questions and
Answers with Verified Solutions
Examination Title Nutrition and Diet Therapy University Final Examination
Specialty Coverage Macronutrients, Micronutrients, Clinical Nutrition Assessment, Medical
Nutrition Therapy (MNT), Enteral & Parenteral Support
Passing Standard 75% Correct Responses
Edition Specification University Level Master Review Edition
Module 1: Principles of Human Nutrition & Macronutrient Metabolism (Questions 1–15)
Question 1
Which enzyme initiated in the mouth is responsible for beginning the digestion of dietary
starches into smaller dextrins and maltose?
• A) Pancreatic lipase
• B) Salivary alpha-amylase
• C) Pepsinogen
• D) Brush border lactase
Correct Answer: B) Salivary alpha-amylase
Salivary alpha-amylase cleaves internal alpha-1,4-glycosidic bonds in complex carbohydrates during
mastication, initiating starch breakdown prior to gastric inactivation.
Question 2
What is the primary physiological role of insoluble dietary fiber (e.g., cellulose, lignin) in
gastrointestinal transit?
• A) Delaying gastric emptying and binding bile acids
• B) Increasing fecal bulk and accelerating colonic transit time
• C) Forming viscous gels that slow glucose absorption
• D) Undergoing total fermentation to short-chain fatty acids in the stomach
Correct Answer: B) Increasing fecal bulk and accelerating colonic transit time
Insoluble fiber absorbs water and resists bacterial fermentation, adding physical volume to stool and
stimulating peristalsis to shorten transit time through the large intestine.
Question 3
An adult client consumes a meal containing 60 grams of carbohydrates, 25 grams of protein,
and 15 grams of fat. What is the total energy yield in kilocalories (kcal)?
• A) 380 kcal
, • B) 475 kcal
• C) 520 kcal
• D) 610 kcal
Correct Answer: B) 475 kcal
Atwater factors: Carbohydrates (4 kcal/g) = 240 kcal; Protein (4 kcal/g) = 100 kcal; Fat (9 kcal/g) = 135 kcal.
Total = 240 + 100 + 135 = 475 kcal.
Question 4
Which lipid fraction is responsible for transporting endogenously synthesized triglycerides from
the liver to peripheral adipose and muscle tissues?
• A) Chylomicrons
• B) Very-Low-Density Lipoproteins (VLDL)
• C) High-Density Lipoproteins (HDL)
• D) Low-Density Lipoproteins (LDL)
Correct Answer: B) Very-Low-Density Lipoproteins (VLDL)
VLDL particles are synthesized in the liver to transport endogenous triglycerides to extrahepatic tissues,
whereas chylomicrons transport exogenous dietary lipids from the intestine.
Question 5
Which essential fatty acid serves as the direct precursor for the synthesis of arachidonic acid
and downstream pro-inflammatory eicosanoids?
• A) Alpha-linolenic acid (Omega-3)
• B) Linoleic acid (Omega-6)
• C) Eicosapentaenoic acid (EPA)
• D) Oleic acid (Omega-9)
Correct Answer: B) Linoleic acid (Omega-6)
Linoleic acid is an essential omega-6 polyunsaturated fatty acid that undergoes desaturation and elongation
to produce arachidonic acid, the precursor for Series-2 prostaglandins and Series-4 leukotrienes.
Question 6
What state of nitrogen balance is expected in a healthy third-trimester pregnant client or a
growing child?
• A) Positive nitrogen balance
• B) Negative nitrogen balance
• C) Equilibrium (zero nitrogen balance)
• D) Variable metabolic balance
Correct Answer: A) Positive nitrogen balance
Positive nitrogen balance occurs when nitrogen intake exceeds nitrogen excretion, indicating tissue
accretion, protein synthesis, and growth during pregnancy, childhood, or recovery from illness.
Question 7
Which amino acid becomes conditionally essential in patients with severe thermal burns, critical
illness, or gastrointestinal mucosal injury?
• A) Alanine
• B) Glutamine
• C) Leucine
, • D) Valine
Correct Answer: B) Glutamine
Glutamine is the primary metabolic fuel for enterocytes and immune cells. During severe metabolic stress,
endogenous synthesis cannot meet demands, making it conditionally essential.
Question 8
What digestive hormone, released by enteroendocrine I-cells in the duodenum in response to
dietary fat and protein, stimulates gallbladder contraction and pancreatic enzyme secretion?
• A) Secretin
• B) Cholecystokinin (CCK)
• C) Gastrin
• D) Gastric inhibitory peptide (GIP)
Correct Answer: B) Cholecystokinin (CCK)
CCK triggers gallbladder contraction to release bile for fat emulsification and stimulates acinar cells of the
pancreas to secrete zymogens for macronutrient digestion.
Question 9
Which hormone acts on the arcuate nucleus of the hypothalamus to suppress appetite and
signal long-term energy sufficiency based on total body fat mass?
• A) Ghrelin
• B) Leptin
• C) Glucagon-like peptide-1 (GLP-1)
• D) Neuropeptide Y
Correct Answer: B) Leptin
Leptin is secreted by adipocytes in proportion to fat mass, binding to hypothalamic receptors to
downregulate orexigenic pathways and inhibit food intake.
Question 10
What metabolic pathway converts non-carbohydrate precursors such as lactate, glycerol, and
glucogenic amino acids into glucose during prolonged fasting?
• A) Glycogenolysis
• B) Gluconeogenesis
• C) Glycolysis
• D) Lipogenesis
Correct Answer: B) Gluconeogenesis
Gluconeogenesis occurs primarily in the liver and renal cortex, synthesizing glucose from non-carbohydrate
substrates to maintain blood glucose during starvation.
Question 11
Which protein source possesses the highest Protein Digestibility-Corrected Amino Acid Score
(PDCAAS) of 1.0, reflecting complete essential amino acid profile and high bioavailability?
• A) Whole wheat gluten
• B) Egg white (ovalbumin) and whey protein
• C) Navy beans
• D) Peanuts
Correct Answer: B) Egg white (ovalbumin) and whey protein
Answers with Verified Solutions
Examination Title Nutrition and Diet Therapy University Final Examination
Specialty Coverage Macronutrients, Micronutrients, Clinical Nutrition Assessment, Medical
Nutrition Therapy (MNT), Enteral & Parenteral Support
Passing Standard 75% Correct Responses
Edition Specification University Level Master Review Edition
Module 1: Principles of Human Nutrition & Macronutrient Metabolism (Questions 1–15)
Question 1
Which enzyme initiated in the mouth is responsible for beginning the digestion of dietary
starches into smaller dextrins and maltose?
• A) Pancreatic lipase
• B) Salivary alpha-amylase
• C) Pepsinogen
• D) Brush border lactase
Correct Answer: B) Salivary alpha-amylase
Salivary alpha-amylase cleaves internal alpha-1,4-glycosidic bonds in complex carbohydrates during
mastication, initiating starch breakdown prior to gastric inactivation.
Question 2
What is the primary physiological role of insoluble dietary fiber (e.g., cellulose, lignin) in
gastrointestinal transit?
• A) Delaying gastric emptying and binding bile acids
• B) Increasing fecal bulk and accelerating colonic transit time
• C) Forming viscous gels that slow glucose absorption
• D) Undergoing total fermentation to short-chain fatty acids in the stomach
Correct Answer: B) Increasing fecal bulk and accelerating colonic transit time
Insoluble fiber absorbs water and resists bacterial fermentation, adding physical volume to stool and
stimulating peristalsis to shorten transit time through the large intestine.
Question 3
An adult client consumes a meal containing 60 grams of carbohydrates, 25 grams of protein,
and 15 grams of fat. What is the total energy yield in kilocalories (kcal)?
• A) 380 kcal
, • B) 475 kcal
• C) 520 kcal
• D) 610 kcal
Correct Answer: B) 475 kcal
Atwater factors: Carbohydrates (4 kcal/g) = 240 kcal; Protein (4 kcal/g) = 100 kcal; Fat (9 kcal/g) = 135 kcal.
Total = 240 + 100 + 135 = 475 kcal.
Question 4
Which lipid fraction is responsible for transporting endogenously synthesized triglycerides from
the liver to peripheral adipose and muscle tissues?
• A) Chylomicrons
• B) Very-Low-Density Lipoproteins (VLDL)
• C) High-Density Lipoproteins (HDL)
• D) Low-Density Lipoproteins (LDL)
Correct Answer: B) Very-Low-Density Lipoproteins (VLDL)
VLDL particles are synthesized in the liver to transport endogenous triglycerides to extrahepatic tissues,
whereas chylomicrons transport exogenous dietary lipids from the intestine.
Question 5
Which essential fatty acid serves as the direct precursor for the synthesis of arachidonic acid
and downstream pro-inflammatory eicosanoids?
• A) Alpha-linolenic acid (Omega-3)
• B) Linoleic acid (Omega-6)
• C) Eicosapentaenoic acid (EPA)
• D) Oleic acid (Omega-9)
Correct Answer: B) Linoleic acid (Omega-6)
Linoleic acid is an essential omega-6 polyunsaturated fatty acid that undergoes desaturation and elongation
to produce arachidonic acid, the precursor for Series-2 prostaglandins and Series-4 leukotrienes.
Question 6
What state of nitrogen balance is expected in a healthy third-trimester pregnant client or a
growing child?
• A) Positive nitrogen balance
• B) Negative nitrogen balance
• C) Equilibrium (zero nitrogen balance)
• D) Variable metabolic balance
Correct Answer: A) Positive nitrogen balance
Positive nitrogen balance occurs when nitrogen intake exceeds nitrogen excretion, indicating tissue
accretion, protein synthesis, and growth during pregnancy, childhood, or recovery from illness.
Question 7
Which amino acid becomes conditionally essential in patients with severe thermal burns, critical
illness, or gastrointestinal mucosal injury?
• A) Alanine
• B) Glutamine
• C) Leucine
, • D) Valine
Correct Answer: B) Glutamine
Glutamine is the primary metabolic fuel for enterocytes and immune cells. During severe metabolic stress,
endogenous synthesis cannot meet demands, making it conditionally essential.
Question 8
What digestive hormone, released by enteroendocrine I-cells in the duodenum in response to
dietary fat and protein, stimulates gallbladder contraction and pancreatic enzyme secretion?
• A) Secretin
• B) Cholecystokinin (CCK)
• C) Gastrin
• D) Gastric inhibitory peptide (GIP)
Correct Answer: B) Cholecystokinin (CCK)
CCK triggers gallbladder contraction to release bile for fat emulsification and stimulates acinar cells of the
pancreas to secrete zymogens for macronutrient digestion.
Question 9
Which hormone acts on the arcuate nucleus of the hypothalamus to suppress appetite and
signal long-term energy sufficiency based on total body fat mass?
• A) Ghrelin
• B) Leptin
• C) Glucagon-like peptide-1 (GLP-1)
• D) Neuropeptide Y
Correct Answer: B) Leptin
Leptin is secreted by adipocytes in proportion to fat mass, binding to hypothalamic receptors to
downregulate orexigenic pathways and inhibit food intake.
Question 10
What metabolic pathway converts non-carbohydrate precursors such as lactate, glycerol, and
glucogenic amino acids into glucose during prolonged fasting?
• A) Glycogenolysis
• B) Gluconeogenesis
• C) Glycolysis
• D) Lipogenesis
Correct Answer: B) Gluconeogenesis
Gluconeogenesis occurs primarily in the liver and renal cortex, synthesizing glucose from non-carbohydrate
substrates to maintain blood glucose during starvation.
Question 11
Which protein source possesses the highest Protein Digestibility-Corrected Amino Acid Score
(PDCAAS) of 1.0, reflecting complete essential amino acid profile and high bioavailability?
• A) Whole wheat gluten
• B) Egg white (ovalbumin) and whey protein
• C) Navy beans
• D) Peanuts
Correct Answer: B) Egg white (ovalbumin) and whey protein
