The digestive system produces enzymes - Edexcel - GCSE Biology - Question 2 - 2018 - Paper 1
Question 2
The digestive system produces enzymes.
Draw one straight line from each enzyme to the nutrient that it breaks down.
**enzyme**
lipase ... show full transcript
Worked Solution & Example Answer:The digestive system produces enzymes - Edexcel - GCSE Biology - Question 2 - 2018 - Paper 1
Step 1
2 (a) Draw one straight line from each enzyme to the nutrient that it breaks down.
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Answer
Lipase breaks down carbohydrate.
Amylase breaks down protein.
Protease breaks down fat.
No lines can be drawn from one enzyme to two nutrients; one enzyme must connect to only one nutrient.
Step 2
2 (b) (i) A description including the following:
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Answer
Organ Y digests more carbohydrate than organ W.
The mass digested in organ Y is 34g compared to the 6g/28g in organ W.
Step 3
2 (b) (ii) A explanation including:
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Answer
Organ Y is the small intestine where food spends more time due to its length. It digests more carbohydrate than any other organ due to its enzymes, specifically containing carbohydrate-digesting enzymes.
Step 4
2 (b) (iii) A suggestion including two of the following:
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Answer
Organ X is the stomach which contains acid; this low pH may denature some enzymes. Additionally, carbohydrate-digesting enzymes, like amylase, may not be present in sufficient quantities.
