Question
The pie charts show the composition of 100 g of four different foods.
Which food provides the most energy?
Answer/Explanation
B
The maximum amount of energy per gram is provided by fats, then by carbohydrates and proteins .Water doesn’t provide calories.
Here’s the breakdown of energy provided by each macronutrient:
1. Fats: Approximately 9 calories per gram
2. Carbohydrates: Approximately 4 calories per gram
3. Proteins: Approximately 4 calories per gram
4. Water: Water itself does not provide energy (calories), as it is a non-nutritive substance.
Therefore, to determine which food provides the most energy, we need to look at the composition of foods and identify the pie chart having high percentage of fats, carbs and proteins and less percentage of water. So the pie chart B has maximum carbs and minimum water, so it will provide the most energy
.
Question
The table shows the main contents of four meals.
Which meal will be the most effective at preventing constipation?
Answer/Explanation
C
Based on the given information, we should consider the meal with the highest fiber content. Fiber plays a crucial role in promoting healthy digestion and preventing constipation. Comparing the fiber content of the four meals: Meal C has highest fibre content (22g per 100g). Therefore, Meal C is likely to be the most effective at preventing constipation. Including fiber-rich foods in your diet is important for maintaining optimal digestive health. Fiber adds bulk to the stool, making it easier to pass through the digestive system. It also helps to soften the stool and prevents constipation by promoting regular bowel movements.
Question
A person has bleeding gums.
This could be caused by a lack of which nutrient?
A calcium
B iron
C vitamin C
D vitamin D
▶️Answer/Explanation
C
Bleeding gums can be a symptom of a deficiency in vitamin C, also known as scurvy. Vitamin C is essential for the production of collagen, a protein that helps maintain the integrity and health of connective tissues, including the gums. A lack of vitamin C weakens the blood vessels, leading to bleeding gums.
Question
The chart is used to find a person’s recommended mass.
For the data provided about body mass and height, which person would benefit most from the
introduction of a calorie-controlled diet and regular exercise?
▶️Answer/Explanation
D
To determine which person would benefit most from the introduction of a calorie-controlled diet and regular exercise, we need to consider the body mass index (BMI) of each individual. BMI is a measure of body fat based on height and weight.
To calculate BMI, we use the formula:
BMI = (mass in kilograms) / (height in meters)^2
Let’s calculate the BMI for each person:
Person A:
Mass = 40 kg
Height = 1.55 m
BMI = 40 / (1.55^2) = 16.63
Person B:
Mass = 50 kg
Height = 1.75 m
BMI = 50 / (1.75^2) = 16.33
Person C:
Mass = 70 kg
Height = 1.80 m
BMI = 70 / (1.80^2) = 21.60
Person D:
Mass = 90 kg
Height = 1.75 m
BMI = 90 / (1.75^2) = 29.39
Based on the calculated BMIs, Person D, with a BMI of 29.39, would benefit most from the introduction of a calorie-controlled diet and regular exercise. This person falls into the “slightly obese” category and has a higher BMI compared to the other individuals. Implementing a calorie-controlled diet and regular exercise can help them achieve weight loss and improve their overall health.
Question
DCPIP can be used to test for vitamin C in food. Lemon juice contains vitamin C.
When lemon juice is tested what are the results?
A starts blue, finishes colourless
B starts colourless, finishes blue
C stays blue
D stays colourless
Answer/Explanation
A
When lemon juice, which contains vitamin C, is tested using DCPIP (2,6-dichlorophenolindophenol), the DCPIP solution is initially blue. However, when vitamin C is present in the lemon juice, it acts as a reducing agent and donates electrons to DCPIP, causing it to be reduced and change color. The DCPIP solution turns from blue to colorless as it is reduced by the ascorbic acid (vitamin C) in the lemon juice. This indicates the presence of vitamin C in the tested sample.
The correct answer is A – starts blue finishes colourless.