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3 Cheese and yogurt are made from milk - Edexcel - GCSE Biology - Question 3 - 2016 - Paper 1
Question 3
3 Cheese and yogurt are made from milk. Both foods contain protein, fat and carbohydrate. The remaining mass is made up of other nutrients and water. The pie chart s... show full transcript
Worked Solution & Example Answer:3 Cheese and yogurt are made from milk - Edexcel - GCSE Biology - Question 3 - 2016 - Paper 1
Step 1
Compare the nutritional content of cheese with that of yogurt.
Answer
When comparing the nutritional content of 100 g of cheese and 100 g of yogurt:
- Protein: Cheese contains 18 g of protein, while yogurt contains 12 g of protein. Thus, cheese has a higher protein content.
- Fat: Cheese contains 32 g of fat, whereas yogurt contains only 4 g. This shows cheese has a significantly higher fat content.
- Carbohydrates: Cheese contains 4 g of carbohydrates compared to yogurt, which has 16 g. Therefore, yogurt has a higher carbohydrate content.
- Other Nutrients and Water: Cheese has 46 g categorized as other nutrients and water, while yogurt’s corresponding value is 68 g. Hence, yogurt has a higher total mass in this category.
Overall, cheese is richer in protein and fat, while yogurt is lower in fat but has more carbohydrates.
Step 2
Calculate the mass of protein in 25 g of cheese.
Answer
To calculate the mass of protein in 25 g of cheese:
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Identify Protein Content in 100 g: Cheese contains 18 g of protein per 100 g.
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Use Proportion to Find Protein in 25 g:
Therefore, the mass of protein in 25 g of cheese is:
rac{18 ext{ g}}{100 ext{ g}} imes 25 ext{ g} = 4.5 ext{ g}
Thus, the mass of protein in 25 g of cheese is 4.5 g.