NURS 225 Nutrition Proctored Exam
Review 2026 [Latest Update] | WCU |
100% Verified Q&A | Grade A
Question 1: Which macronutrient provides the most energy per gram?
A) Carbohydrate
B) Protein
C) Alcohol
D) Fat
Correct Answer: D) Fat
Explanation: Fat supplies 9 kcal/g, whereas carbohydrate and protein each provide 4 kcal/g and
alcohol 7 kcal/g, making fat the most energy-dense macronutrient.
Question 2: The primary site of carbohydrate digestion is the
A) Mouth
B) Stomach
C) Duodenum
D) Colon
,Correct Answer: C) Duodenum
Explanation: Pancreatic amylase and brush-border enzymes in the duodenum break starches into
absorbable monosaccharides.
Question 3: Which enzyme initiates protein digestion in the stomach?
A) Pepsin
B) Trypsin
C) Amylase
D) Lipase
Correct Answer: A) Pepsin
Explanation: Pepsinogen is activated to pepsin by gastric HCl, beginning protein hydrolysis into
smaller peptides.
Question 4: A patient consuming 2200 kcal/day is advised to limit saturated fat to <10 % of
calories. The maximum grams of saturated fat allowed is approximately
A) 15 g
B) 24 g
C) 30 g
D) 40 g
Correct Answer: B) 24 g
,Explanation: 10 % of 2200 kcal = 220 kcal; 220 kcal ÷ 9 kcal/g = 24.4 g, rounded to 24 g.
Question 5: Which lipid is primarily used to synthesize bile acids?
A) Cholesterol
B) Triglyceride
C) Phospholipid
D) Linoleic acid
Correct Answer: A) Cholesterol
Explanation: Hepatic conversion of cholesterol to bile acids is the major pathway for cholesterol
catabolism and aids fat absorption.
Question 6: The acceptable macronutrient distribution range (AMDR) for protein is
A) 5–10 %
B) 10–35 %
C) 25–40 %
D) 45–65 %
Correct Answer: B) 10–35 %
Explanation: AMDR for protein is 10–35 % of total daily energy, covering needs for most age and
activity groups.
Question 7: Which vitamin requires intrinsic factor for absorption?
, A) Folate
B) Vitamin B₁₂
C) Vitamin C
D) Niacin
Correct Answer: B) Vitamin B₁₂
Explanation: Gastric parietal cells secrete intrinsic factor that binds B₁₂ in the ileum, enabling
receptor-mediated absorption.
Question 8: Deficiency of which mineral is the leading cause of preventable intellectual disability
worldwide?
A) Iron
B) Iodine
C) Zinc
D) Selenium
Correct Answer: B) Iodine
Explanation: Maternal iodine deficiency causes fetal brain damage; universal salt iodization has
markedly reduced this risk.
Question 9: Which dietary component is most effective at raising HDL-cholesterol?
A) Trans fat
Review 2026 [Latest Update] | WCU |
100% Verified Q&A | Grade A
Question 1: Which macronutrient provides the most energy per gram?
A) Carbohydrate
B) Protein
C) Alcohol
D) Fat
Correct Answer: D) Fat
Explanation: Fat supplies 9 kcal/g, whereas carbohydrate and protein each provide 4 kcal/g and
alcohol 7 kcal/g, making fat the most energy-dense macronutrient.
Question 2: The primary site of carbohydrate digestion is the
A) Mouth
B) Stomach
C) Duodenum
D) Colon
,Correct Answer: C) Duodenum
Explanation: Pancreatic amylase and brush-border enzymes in the duodenum break starches into
absorbable monosaccharides.
Question 3: Which enzyme initiates protein digestion in the stomach?
A) Pepsin
B) Trypsin
C) Amylase
D) Lipase
Correct Answer: A) Pepsin
Explanation: Pepsinogen is activated to pepsin by gastric HCl, beginning protein hydrolysis into
smaller peptides.
Question 4: A patient consuming 2200 kcal/day is advised to limit saturated fat to <10 % of
calories. The maximum grams of saturated fat allowed is approximately
A) 15 g
B) 24 g
C) 30 g
D) 40 g
Correct Answer: B) 24 g
,Explanation: 10 % of 2200 kcal = 220 kcal; 220 kcal ÷ 9 kcal/g = 24.4 g, rounded to 24 g.
Question 5: Which lipid is primarily used to synthesize bile acids?
A) Cholesterol
B) Triglyceride
C) Phospholipid
D) Linoleic acid
Correct Answer: A) Cholesterol
Explanation: Hepatic conversion of cholesterol to bile acids is the major pathway for cholesterol
catabolism and aids fat absorption.
Question 6: The acceptable macronutrient distribution range (AMDR) for protein is
A) 5–10 %
B) 10–35 %
C) 25–40 %
D) 45–65 %
Correct Answer: B) 10–35 %
Explanation: AMDR for protein is 10–35 % of total daily energy, covering needs for most age and
activity groups.
Question 7: Which vitamin requires intrinsic factor for absorption?
, A) Folate
B) Vitamin B₁₂
C) Vitamin C
D) Niacin
Correct Answer: B) Vitamin B₁₂
Explanation: Gastric parietal cells secrete intrinsic factor that binds B₁₂ in the ileum, enabling
receptor-mediated absorption.
Question 8: Deficiency of which mineral is the leading cause of preventable intellectual disability
worldwide?
A) Iron
B) Iodine
C) Zinc
D) Selenium
Correct Answer: B) Iodine
Explanation: Maternal iodine deficiency causes fetal brain damage; universal salt iodization has
markedly reduced this risk.
Question 9: Which dietary component is most effective at raising HDL-cholesterol?
A) Trans fat
