StraighterLine Nutrition Quiz Practice
Questions And Correct Answers
(Verified Answers) Plus Rationales
2025|2026 Q&A | Instant Download Pdf
Q1. Which macronutrient provides the highest number of calories per gram?
a. Carbohydrates
b. Protein
c. Fat
d. Alcohol
Fat provides 9 kcal per gram, while carbohydrates and proteins provide 4
kcal per gram, and alcohol provides 7 kcal per gram.
Q2. The primary function of carbohydrates is to:
a. Build muscle tissue
b. Provide energy
c. Transport vitamins
d. Aid in hormone production
,Carbohydrates are the body’s main source of quick energy, especially for
the brain and red blood cells.
Q3. Which vitamin is fat-soluble?
a. Vitamin C
b. Vitamin B6
c. Vitamin D
d. Vitamin B12
Fat-soluble vitamins include A, D, E, and K, which are stored in body fat
and the liver.
Q4. What is the recommended daily intake of fiber for adults?
a. 5–10 grams
b. 10–15 grams
c. 15–20 grams
d. 25–38 grams
Adults should consume 25 grams (women) to 38 grams (men) of fiber daily
to support digestive health and heart health.
Q5. Which mineral is essential for the formation of hemoglobin?
a. Calcium
b. Zinc
c. Iron
d. Phosphorus
Iron is a key component of hemoglobin, allowing red blood cells to carry
oxygen.
,Q6. The process of adding nutrients back to foods that were lost during
processing is called:
a. Fortification
b. Enrichment
c. Supplementation
d. Reconstitution
Enrichment restores nutrients lost during processing, while fortification
adds nutrients not originally present.
Q7. Which of the following foods is the best source of complete protein?
a. Rice
b. Beans
c. Eggs
d. Wheat
Complete proteins contain all essential amino acids, and eggs are an
excellent source.
Q8. The deficiency of which vitamin can lead to scurvy?
a. Vitamin A
b. Vitamin C
c. Vitamin D
d. Vitamin K
Vitamin C deficiency causes scurvy, characterized by bleeding gums and
poor wound healing.
, Q9. Which hormone helps regulate blood glucose by lowering it?
a. Glucagon
b. Cortisol
c. Epinephrine
d. Insulin
Insulin lowers blood glucose by facilitating its uptake into cells.
Q10. Which nutrient is the primary energy source during high-intensity
exercise?
a. Fat
b. Carbohydrates
c. Protein
d. Alcohol
Carbohydrates are the preferred fuel for quick, high-intensity exercise.
Q11. Which vitamin is most likely to cause toxicity if consumed in excess?
a. Vitamin B1
b. Vitamin B12
c. Vitamin A
d. Vitamin C
Fat-soluble vitamins like vitamin A can accumulate in the body and cause
toxicity.
Q12. The body’s storage form of carbohydrate is called:
a. Glucose
b. Sucrose
Questions And Correct Answers
(Verified Answers) Plus Rationales
2025|2026 Q&A | Instant Download Pdf
Q1. Which macronutrient provides the highest number of calories per gram?
a. Carbohydrates
b. Protein
c. Fat
d. Alcohol
Fat provides 9 kcal per gram, while carbohydrates and proteins provide 4
kcal per gram, and alcohol provides 7 kcal per gram.
Q2. The primary function of carbohydrates is to:
a. Build muscle tissue
b. Provide energy
c. Transport vitamins
d. Aid in hormone production
,Carbohydrates are the body’s main source of quick energy, especially for
the brain and red blood cells.
Q3. Which vitamin is fat-soluble?
a. Vitamin C
b. Vitamin B6
c. Vitamin D
d. Vitamin B12
Fat-soluble vitamins include A, D, E, and K, which are stored in body fat
and the liver.
Q4. What is the recommended daily intake of fiber for adults?
a. 5–10 grams
b. 10–15 grams
c. 15–20 grams
d. 25–38 grams
Adults should consume 25 grams (women) to 38 grams (men) of fiber daily
to support digestive health and heart health.
Q5. Which mineral is essential for the formation of hemoglobin?
a. Calcium
b. Zinc
c. Iron
d. Phosphorus
Iron is a key component of hemoglobin, allowing red blood cells to carry
oxygen.
,Q6. The process of adding nutrients back to foods that were lost during
processing is called:
a. Fortification
b. Enrichment
c. Supplementation
d. Reconstitution
Enrichment restores nutrients lost during processing, while fortification
adds nutrients not originally present.
Q7. Which of the following foods is the best source of complete protein?
a. Rice
b. Beans
c. Eggs
d. Wheat
Complete proteins contain all essential amino acids, and eggs are an
excellent source.
Q8. The deficiency of which vitamin can lead to scurvy?
a. Vitamin A
b. Vitamin C
c. Vitamin D
d. Vitamin K
Vitamin C deficiency causes scurvy, characterized by bleeding gums and
poor wound healing.
, Q9. Which hormone helps regulate blood glucose by lowering it?
a. Glucagon
b. Cortisol
c. Epinephrine
d. Insulin
Insulin lowers blood glucose by facilitating its uptake into cells.
Q10. Which nutrient is the primary energy source during high-intensity
exercise?
a. Fat
b. Carbohydrates
c. Protein
d. Alcohol
Carbohydrates are the preferred fuel for quick, high-intensity exercise.
Q11. Which vitamin is most likely to cause toxicity if consumed in excess?
a. Vitamin B1
b. Vitamin B12
c. Vitamin A
d. Vitamin C
Fat-soluble vitamins like vitamin A can accumulate in the body and cause
toxicity.
Q12. The body’s storage form of carbohydrate is called:
a. Glucose
b. Sucrose
