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Some foods contain prebiotics - Edexcel - GCSE Biology - Question 2 - 2013 - Paper 1
Question 2
Some foods contain prebiotics. Complete the sentence by putting a cross (✓) in the box next to your answer. The active ingredients in prebiotics are A lactic ac... show full transcript
Worked Solution & Example Answer:Some foods contain prebiotics - Edexcel - GCSE Biology - Question 2 - 2013 - Paper 1
Step 1
Calculate the difference between the number of bacteria present in the digestive system before and after the yogurt was eaten.
Answer
From the graph, the number of useful bacteria before eating yogurt is approximately 8000 and after eating yogurt is approximately 14000.
To find the difference:
Thus, the difference in the number of bacteria present is 6000.