Igcse Model Questions Vol1 2019 Biology Question 3

A group of students carried out a nutrition analysis of three locally available food items using standard laboratory methods. The items were: - Sample A: boiled rice - Sample B: roasted groundnuts - Sample C: fried plantain For each sample a 10.0 g portion was dried and then the following masses were obtained after the respective extractions: | Sample | Carbohydrate extracted (g) | Protein extracted (g) | Fat extracted (g) | |--------|----------------------------|-----------------------|-------------------| | A | 4.5 | 1.2 | 2.0 | | B | 2.0 | 3.5 | 5.0 | | C | 5.5 | 0.8 | 3.0 | Using the conversion factors 1 g carbohydrate = 4 kcal, 1 g protein = 4 kcal and 1 g fat = 9 kcal, answer the following: