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BIO 121 – Essentials of Nutrition Practice Questions (NEW UPDATED VERSION)
LATEST ACTUAL EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED
QUESTIONS AND ANSWERS) | GUARANTEED PASS A+ UPDATED 2026
1. Which nutrient provides the most energy per gram?
A) Carbohydrates
B) Protein
C) Fat
D) Vitamins
Answer: C – Fat provides 9 kcal/g, more than carbs or protein (4 kcal/g).
2. Which macronutrient is the primary energy source for the brain?
A) Fat
B) Carbohydrate
C) Protein
D) Fiber
Answer: B – Glucose from carbohydrates is the brain’s main fuel.
3. Essential nutrients are defined as:
A) Nutrients the body can produce
B) Nutrients required from the diet
C) Nutrients that provide energy only
D) Nutrients that the body stores
Answer: B – Essential nutrients must come from the diet.
4. Which nutrient is involved in muscle repair and growth?
A) Fat
B) Protein
C) Carbohydrate
D) Fiber
Answer: B – Protein provides amino acids for tissue repair.
5. Alcohol provides how many kcal per gram?
A) 4
B) 7
C) 9
D) 0
Answer: B – Alcohol provides 7 kcal/g.
6. Which vitamin is fat-soluble?
A) Vitamin C
B) Vitamin B12
C) Vitamin D
2026 2027 GRADED A+
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D) Vitamin B6
Answer: C – Vitamins A, D, E, K are fat-soluble.
7. Water-soluble vitamins include:
A) Vitamins A, D, E
B) Vitamin K only
C) Vitamins C and B-complex
D) Vitamin A only
Answer: C – These dissolve in water and are not stored extensively.
8. Which macronutrient does not provide energy directly?
A) Carbohydrate
B) Fat
C) Protein
D) Vitamins
Answer: D – Vitamins facilitate metabolism but do not provide energy.
9. The Dietary Reference Intake (DRI) is used to:
A) Measure blood sugar
B) Recommend daily nutrient intake
C) Calculate body fat
D) Replace calories in meals
Answer: B – DRI guides nutrient intake for health.
10. Which macronutrient is the most calorie-dense?
A) Carbs
B) Protein
C) Fat
D) Alcohol
Answer: C – Fat is 9 kcal/g.
11–20: Carbohydrates
11. Simple carbohydrates include:
A) Starches
B) Fiber
C) Sugars
D) Glycogen
Answer: C – Sugars like glucose, fructose, sucrose.
12. Dietary fiber is classified as:
A) Soluble or insoluble
B) Essential or nonessential
C) Simple or complex
D) Sugar alcohol
Answer: A – Soluble fiber dissolves in water; insoluble does not.
13. Function of carbohydrates in the body:
A) Build tissue
B) Provide energy
C) Store fat
2026 2027 GRADED A+
BIO 121 – Essentials of Nutrition Practice Questions (NEW UPDATED VERSION)
LATEST ACTUAL EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED
QUESTIONS AND ANSWERS) | GUARANTEED PASS A+ UPDATED 2026
1. Which nutrient provides the most energy per gram?
A) Carbohydrates
B) Protein
C) Fat
D) Vitamins
Answer: C – Fat provides 9 kcal/g, more than carbs or protein (4 kcal/g).
2. Which macronutrient is the primary energy source for the brain?
A) Fat
B) Carbohydrate
C) Protein
D) Fiber
Answer: B – Glucose from carbohydrates is the brain’s main fuel.
3. Essential nutrients are defined as:
A) Nutrients the body can produce
B) Nutrients required from the diet
C) Nutrients that provide energy only
D) Nutrients that the body stores
Answer: B – Essential nutrients must come from the diet.
4. Which nutrient is involved in muscle repair and growth?
A) Fat
B) Protein
C) Carbohydrate
D) Fiber
Answer: B – Protein provides amino acids for tissue repair.
5. Alcohol provides how many kcal per gram?
A) 4
B) 7
C) 9
D) 0
Answer: B – Alcohol provides 7 kcal/g.
6. Which vitamin is fat-soluble?
A) Vitamin C
B) Vitamin B12
C) Vitamin D
2026 2027 GRADED A+
, 2|Page
D) Vitamin B6
Answer: C – Vitamins A, D, E, K are fat-soluble.
7. Water-soluble vitamins include:
A) Vitamins A, D, E
B) Vitamin K only
C) Vitamins C and B-complex
D) Vitamin A only
Answer: C – These dissolve in water and are not stored extensively.
8. Which macronutrient does not provide energy directly?
A) Carbohydrate
B) Fat
C) Protein
D) Vitamins
Answer: D – Vitamins facilitate metabolism but do not provide energy.
9. The Dietary Reference Intake (DRI) is used to:
A) Measure blood sugar
B) Recommend daily nutrient intake
C) Calculate body fat
D) Replace calories in meals
Answer: B – DRI guides nutrient intake for health.
10. Which macronutrient is the most calorie-dense?
A) Carbs
B) Protein
C) Fat
D) Alcohol
Answer: C – Fat is 9 kcal/g.
11–20: Carbohydrates
11. Simple carbohydrates include:
A) Starches
B) Fiber
C) Sugars
D) Glycogen
Answer: C – Sugars like glucose, fructose, sucrose.
12. Dietary fiber is classified as:
A) Soluble or insoluble
B) Essential or nonessential
C) Simple or complex
D) Sugar alcohol
Answer: A – Soluble fiber dissolves in water; insoluble does not.
13. Function of carbohydrates in the body:
A) Build tissue
B) Provide energy
C) Store fat
2026 2027 GRADED A+
