NST10 Final Exam - Sample Questions
with Solutions
1. Which of the following is a primary function of carbohydrates in the human body?
a) Provide energy (Correct Answer)
b) Aid in digestion
c) Build body structures
d) Support immune function
Explanation: Carbohydrates are the body's primary source of energy. They are broken down into
glucose, which is used by cells for fuel.
2. Which of the following is the most important function of protein in the body?
a) Building and repairing tissues (Correct Answer)
b) Providing long-term energy storage
c) Helping with the absorption of vitamins
d) Regulating body temperature
,Explanation: Proteins are essential for building and repairing tissues, making enzymes, and supporting
immune functions.
3. Which vitamin is essential for the absorption of calcium in the body?
a) Vitamin A
b) Vitamin B12
c) Vitamin D (Correct Answer)
d) Vitamin E
Explanation: Vitamin D is required for the absorption of calcium in the intestine. It helps maintain
bone health.
4. What is the primary role of insulin in the body?
a) To break down carbohydrates
b) To transport glucose into cells (Correct Answer)
c) To convert glucose into glycogen
d) To regulate sodium levels in the body
Explanation: Insulin helps regulate blood sugar levels by allowing glucose to enter cells for energy
production or storage.
5. Which of the following is a feature of soluble fiber?
a) It speeds up the movement of food through the digestive tract
,b) It is easily digested by the body
c) It can help lower cholesterol levels (Correct Answer)
d) It is found only in animal products
Explanation: Soluble fiber dissolves in water and can help lower blood cholesterol levels by binding to
cholesterol and removing it from the body.
6. What is the main function of bile in fat digestion?
a) Break down protein molecules
b) Emulsify fat to increase surface area for enzymes (Correct Answer)
c) Neutralize stomach acids
d) Absorb vitamins A, D, E, and K
Explanation: Bile emulsifies fats, breaking them into smaller droplets to increase the surface area for
enzymes to act and digest fats.
7. Which of the following is a common source of omega-3 fatty acids?
a) Chicken
b) Walnuts (Correct Answer)
c) Whole milk
d) White rice
, Explanation: Omega-3 fatty acids are found in high amounts in walnuts, fatty fish, and certain seeds.
8. Which of the following is NOT a water-soluble vitamin?
a) Vitamin C
b) Vitamin B6
c) Vitamin A (Correct Answer)
d) Vitamin B12
Explanation: Vitamin A is a fat-soluble vitamin, while vitamin C, B6, and B12 are water-soluble.
9. What is the primary source of energy for the brain?
a) Protein
b) Fat
c) Glucose (Correct Answer)
d) Ketones
Explanation: The brain primarily uses glucose for energy, although it can use ketones during periods of
fasting or low carbohydrate intake.
10. Which of the following minerals is important for maintaining fluid balance in the body?
a) Magnesium
with Solutions
1. Which of the following is a primary function of carbohydrates in the human body?
a) Provide energy (Correct Answer)
b) Aid in digestion
c) Build body structures
d) Support immune function
Explanation: Carbohydrates are the body's primary source of energy. They are broken down into
glucose, which is used by cells for fuel.
2. Which of the following is the most important function of protein in the body?
a) Building and repairing tissues (Correct Answer)
b) Providing long-term energy storage
c) Helping with the absorption of vitamins
d) Regulating body temperature
,Explanation: Proteins are essential for building and repairing tissues, making enzymes, and supporting
immune functions.
3. Which vitamin is essential for the absorption of calcium in the body?
a) Vitamin A
b) Vitamin B12
c) Vitamin D (Correct Answer)
d) Vitamin E
Explanation: Vitamin D is required for the absorption of calcium in the intestine. It helps maintain
bone health.
4. What is the primary role of insulin in the body?
a) To break down carbohydrates
b) To transport glucose into cells (Correct Answer)
c) To convert glucose into glycogen
d) To regulate sodium levels in the body
Explanation: Insulin helps regulate blood sugar levels by allowing glucose to enter cells for energy
production or storage.
5. Which of the following is a feature of soluble fiber?
a) It speeds up the movement of food through the digestive tract
,b) It is easily digested by the body
c) It can help lower cholesterol levels (Correct Answer)
d) It is found only in animal products
Explanation: Soluble fiber dissolves in water and can help lower blood cholesterol levels by binding to
cholesterol and removing it from the body.
6. What is the main function of bile in fat digestion?
a) Break down protein molecules
b) Emulsify fat to increase surface area for enzymes (Correct Answer)
c) Neutralize stomach acids
d) Absorb vitamins A, D, E, and K
Explanation: Bile emulsifies fats, breaking them into smaller droplets to increase the surface area for
enzymes to act and digest fats.
7. Which of the following is a common source of omega-3 fatty acids?
a) Chicken
b) Walnuts (Correct Answer)
c) Whole milk
d) White rice
, Explanation: Omega-3 fatty acids are found in high amounts in walnuts, fatty fish, and certain seeds.
8. Which of the following is NOT a water-soluble vitamin?
a) Vitamin C
b) Vitamin B6
c) Vitamin A (Correct Answer)
d) Vitamin B12
Explanation: Vitamin A is a fat-soluble vitamin, while vitamin C, B6, and B12 are water-soluble.
9. What is the primary source of energy for the brain?
a) Protein
b) Fat
c) Glucose (Correct Answer)
d) Ketones
Explanation: The brain primarily uses glucose for energy, although it can use ketones during periods of
fasting or low carbohydrate intake.
10. Which of the following minerals is important for maintaining fluid balance in the body?
a) Magnesium
