StraighterLine Nutrition Final Practice
Exam Questions And Correct Answers
(Verified Answers) Plus Rationales
2025|2026 Q&A | Instant Download Pdf
1. Which nutrient is the primary source of energy for the body?
A. Protein
B. Fat
C. Carbohydrate
D. Vitamins
Carbohydrates are the body’s main energy source because they are
quickly converted to glucose for fuel.
2. Which of the following is a micronutrient?
A. Protein
B. Fat
C. Vitamin C
D. Glucose
, Micronutrients include vitamins and minerals, which are needed in
small amounts for metabolic processes.
3. Which organ is primarily responsible for nutrient absorption?
A. Stomach
B. Small intestine
C. Large intestine
D. Pancreas
The small intestine has villi and microvilli that increase surface area
for nutrient absorption.
4. Which carbohydrate is known as “blood sugar”?
A. Fructose
B. Galactose
C. Glucose
D. Sucrose
Glucose is the primary sugar found in blood and the main energy
source for cells.
5. Which vitamin is fat-soluble?
A. Vitamin C
B. Vitamin B12
C. Vitamin D
D. Thiamin
Fat-soluble vitamins (A, D, E, K) require dietary fat for absorption.
, 6. Which mineral is important for oxygen transport in the blood?
A. Calcium
B. Zinc
C. Iron
D. Magnesium
Iron is a component of hemoglobin, which carries oxygen in red
blood cells.
7. A diet high in saturated fat is most strongly linked to which disease?
A. Cancer
B. Heart disease
C. Osteoporosis
D. Scurvy
Saturated fats raise LDL cholesterol, increasing heart disease risk.
8. Which nutrient provides the highest energy per gram?
A. Carbohydrate
B. Fat
C. Protein
D. Alcohol
Fat provides 9 kcal/gram, higher than carbohydrates and proteins (4
kcal/gram).
9. Which vitamin deficiency causes rickets?
A. Vitamin C
B. Vitamin A
Exam Questions And Correct Answers
(Verified Answers) Plus Rationales
2025|2026 Q&A | Instant Download Pdf
1. Which nutrient is the primary source of energy for the body?
A. Protein
B. Fat
C. Carbohydrate
D. Vitamins
Carbohydrates are the body’s main energy source because they are
quickly converted to glucose for fuel.
2. Which of the following is a micronutrient?
A. Protein
B. Fat
C. Vitamin C
D. Glucose
, Micronutrients include vitamins and minerals, which are needed in
small amounts for metabolic processes.
3. Which organ is primarily responsible for nutrient absorption?
A. Stomach
B. Small intestine
C. Large intestine
D. Pancreas
The small intestine has villi and microvilli that increase surface area
for nutrient absorption.
4. Which carbohydrate is known as “blood sugar”?
A. Fructose
B. Galactose
C. Glucose
D. Sucrose
Glucose is the primary sugar found in blood and the main energy
source for cells.
5. Which vitamin is fat-soluble?
A. Vitamin C
B. Vitamin B12
C. Vitamin D
D. Thiamin
Fat-soluble vitamins (A, D, E, K) require dietary fat for absorption.
, 6. Which mineral is important for oxygen transport in the blood?
A. Calcium
B. Zinc
C. Iron
D. Magnesium
Iron is a component of hemoglobin, which carries oxygen in red
blood cells.
7. A diet high in saturated fat is most strongly linked to which disease?
A. Cancer
B. Heart disease
C. Osteoporosis
D. Scurvy
Saturated fats raise LDL cholesterol, increasing heart disease risk.
8. Which nutrient provides the highest energy per gram?
A. Carbohydrate
B. Fat
C. Protein
D. Alcohol
Fat provides 9 kcal/gram, higher than carbohydrates and proteins (4
kcal/gram).
9. Which vitamin deficiency causes rickets?
A. Vitamin C
B. Vitamin A
