A 40 g serving of a breakfast cereal contains 2 mg of iron - Scottish Highers Human Biology - Question 8 - 2015
Question 8
A 40 g serving of a breakfast cereal contains 2 mg of iron. Only 25% of this iron is absorbed into the bloodstream.
If a pregnant woman requires a daily uptake of 6... show full transcript
Worked Solution & Example Answer:A 40 g serving of a breakfast cereal contains 2 mg of iron - Scottish Highers Human Biology - Question 8 - 2015
Step 1
Calculate the Amount of Iron Absorbed per Serving
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Answer
In a 40 g serving, the cereal contains 2 mg of iron. Since only 25% is absorbed,
we can calculate the absorbed iron:
Absorbed iron=2 mg×0.25=0.5 mg
Step 2
Determine How Many Servings are Needed for 6 mg of Iron
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To meet the required 6 mg of iron intake:
Number of servings=0.5 mg/serving6 mg=12 servings
Step 3
Calculate the Total Weight of Cereal Needed
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Answer
Each serving weighs 40 g. Therefore, the total weight of cereal needed is:
Total weight=12 servings×40 g/serving=480 g
Thus, to meet her daily requirement, she would need to eat 480 g of cereal each day.
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