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A student investigated the activity of a human enzyme at different temperatures - Edexcel - GCSE Biology - Question 6 - 2020 - Paper 1

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A student investigated the activity of a human enzyme at different temperatures. The student measured the mass of product formed after 10 minutes at different temper... show full transcript

Worked Solution & Example Answer:A student investigated the activity of a human enzyme at different temperatures - Edexcel - GCSE Biology - Question 6 - 2020 - Paper 1

Step 1

Describe the trends shown in Figure 10.

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Answer

The graph indicates that the mass of product formed increases as the temperature rises up to 40°C, where it reaches a maximum of 300mg. Beyond this point, the mass of product starts to decrease, showing that the enzyme becomes less active at temperatures higher than the optimum temperature.

Step 2

Draw one straight line from each food group to the products of digestion for that food group.

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Answer

  1. From 'carbohydrate' draw a line to 'glucose'.
  2. From 'fat' draw a line to 'fatty acids and glycerol'.

Step 3

Which enzyme breaks down fat?

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Answer

D lipase

Step 4

Explain the reason why no product will be formed if the enzyme is mixed with substrate Q.

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Answer

The shape of the active site of the enzyme does not match substrate Q. Therefore, the enzyme cannot bind to the substrate, preventing any reaction from occurring and resulting in no product being formed.

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