Nutrition Practice Questions
IGCSE (Cambridge) · IGCSE Biology · 142 free MCQs with instant results and detailed explanations.
142
Total
42
Easy
73
Medium
27
Hard
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Sample Questions from Nutrition
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
What is the primary function of carbohydrates in the human diet?
A.
To provide energy
B.
To build muscle
C.
To regulate body temperature
D.
To enhance vision
Show Answer & Explanation
Correct Answer: A
Carbohydrates are primarily used by the body as a source of energy. They are broken down into glucose, which fuels various bodily functions and physical activity.
Q2
Easy
Which vitamin is primarily responsible for maintaining healthy vision?
A.
Vitamin A
B.
Vitamin C
C.
Vitamin D
D.
Vitamin K
Show Answer & Explanation
Correct Answer: A
Vitamin A is essential for maintaining healthy vision as it is a component of rhodopsin, a protein in the eyes that allows us to see in low light conditions.
Q3
Easy
Which of the following is a source of protein in a vegetarian diet?
A.
Chicken
B.
Tofu
C.
Fish
D.
Eggs
Show Answer & Explanation
Correct Answer: B
Tofu, made from soybeans, is a rich source of protein in a vegetarian diet. Unlike chicken, fish, or eggs, it does not come from animal sources and provides essential amino acids.
Q4
Medium
Which of the following nutrients is primarily responsible for providing energy in the human body?
A.
Proteins
B.
Fats
C.
Vitamins
D.
Minerals
Show Answer & Explanation
Correct Answer: B
Fats provide the most concentrated source of energy in the diet, yielding approximately 9 calories per gram, more than carbohydrates and proteins.
Q5
Medium
What is the main role of dietary fiber in the human digestive system?
A.
To provide energy
B.
To aid in digestion and prevent constipation
C.
To help absorb vitamins
D.
To build muscle mass
Show Answer & Explanation
Correct Answer: B
Dietary fiber helps to regulate the body's use of sugars, helping to keep hunger and blood sugar in check, and it aids digestion by promoting bowel regularity.
Q6
Medium
Which vitamin is essential for the synthesis of collagen and also acts as an antioxidant?
A.
Vitamin A
B.
Vitamin C
C.
Vitamin D
D.
Vitamin E
Show Answer & Explanation
Correct Answer: B
Vitamin C is crucial for collagen synthesis, which is important for skin, cartilage, tendons, ligaments, and blood vessels, and it also acts as an antioxidant.
Q7
Medium
Which of the following food sources is richest in protein?
A.
Rice
B.
Chicken breast
C.
Potatoes
D.
Apples
Show Answer & Explanation
Correct Answer: B
Chicken breast is a high-quality source of protein, containing more protein per serving than rice, potatoes, or apples, which are lower in protein content.
Q8
Hard
Which of the following statements accurately describes the role of enzymes in human digestion?
A.
Enzymes increase the temperature of the food to aid digestion.
B.
Enzymes are consumed in the reaction and must be replenished after each use.
C.
Enzymes lower the activation energy required for chemical reactions in digestion.
D.
Enzymes change the pH of the digestive system to allow for better nutrient absorption.
Show Answer & Explanation
Correct Answer: C
Enzymes act as catalysts by lowering the activation energy needed for digestion, thereby speeding up the chemical reactions without being consumed in the process.
Q9
Hard
Which of the following nutrients is primarily responsible for the growth and repair of tissues in the human body?
A.
Proteins
B.
Carbohydrates
C.
Fats
D.
Vitamins
Show Answer & Explanation
Correct Answer: A
Proteins are essential for the growth and repair of tissues as they provide amino acids which are the building blocks of cells and tissues. They play a crucial role in muscle development and overall bodily functions.
Q10
Hard
A student conducts an experiment to determine the effect of varying glucose concentrations on yeast fermentation. If the highest level of fermentation is observed at a glucose concentration of 10%, what can be inferred about the yeast's metabolic activity?
A.
Yeast is most efficient at 10% glucose concentration.
B.
Higher glucose concentrations will always enhance fermentation.
C.
Yeast cannot ferment glucose at lower concentrations.
D.
Fermentation does not depend on glucose concentrations.
Show Answer & Explanation
Correct Answer: A
The observation that the highest level of fermentation occurs at a 10% glucose concentration suggests that this is the optimal concentration for yeast metabolic activity, maximizing its fermentation process.
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Nutrition — IGCSE (Cambridge) IGCSE Biology Practice Questions Online
This page contains 142 practice MCQs for the chapter Nutrition in IGCSE (Cambridge) IGCSE Biology. The questions are organized by difficulty — 42 easy, 73 medium, 27 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit.