Q. What is the function of antioxidants in the diet?
-
A.
To provide energy
-
B.
To support immune function
-
C.
To protect cells from damage
-
D.
To aid in digestion
Solution
Antioxidants help protect cells from oxidative stress and damage caused by free radicals.
Correct Answer:
C
— To protect cells from damage
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Q. What is the main function of proteins in the body?
-
A.
To provide energy
-
B.
To build and repair tissues
-
C.
To store nutrients
-
D.
To regulate body temperature
Solution
Proteins are crucial for building and repairing tissues, as well as serving as enzymes and hormones.
Correct Answer:
B
— To build and repair tissues
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Q. What is the primary function of carbohydrates in the human body?
-
A.
To provide energy
-
B.
To build muscle
-
C.
To regulate hormones
-
D.
To transport oxygen
Solution
Carbohydrates are the body's main source of energy, providing fuel for the brain, muscles, and other tissues.
Correct Answer:
A
— To provide energy
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Q. What is the primary source of energy during prolonged exercise?
-
A.
Glucose
-
B.
Fatty acids
-
C.
Amino acids
-
D.
Lactate
Solution
During prolonged exercise, the body primarily utilizes fatty acids as a source of energy once glycogen stores are depleted.
Correct Answer:
B
— Fatty acids
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Q. What is the role of dietary fiber in human nutrition?
-
A.
To provide essential amino acids
-
B.
To aid in digestion
-
C.
To supply energy
-
D.
To enhance fat absorption
Solution
Dietary fiber aids in digestion by promoting regular bowel movements and preventing constipation.
Correct Answer:
B
— To aid in digestion
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Q. Which macronutrient is most energy-dense?
-
A.
Carbohydrates
-
B.
Proteins
-
C.
Fats
-
D.
Vitamins
Solution
Fats provide the most energy per gram, yielding approximately 9 calories per gram compared to 4 calories for carbohydrates and proteins.
Correct Answer:
C
— Fats
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Q. Which mineral is vital for oxygen transport in the blood?
-
A.
Calcium
-
B.
Iron
-
C.
Potassium
-
D.
Sodium
Solution
Iron is a key component of hemoglobin, which binds to oxygen in red blood cells for transport throughout the body.
Correct Answer:
B
— Iron
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