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6 (a) A student investigated the activity of a human enzyme at different temperatures - Edexcel - GCSE Biology - Question 6 - 2020 - Paper 1
Question 6
6 (a) 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 ... show full transcript
Worked Solution & Example Answer:6 (a) 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.
Answer
The graph in Figure 10 shows that the mass of product formed increases as the temperature rises up to 40°C, reaching a maximum mass of 300 mg. After 40°C, the mass of product formed decreases. This indicates that the optimal temperature for the enzyme's activity is 40°C. As temperatures surpass this point, the enzyme may begin to denature, resulting in diminished activity.
Step 2
Step 4
Explain the reason why no product will be formed if the enzyme is mixed with substrate Q.
Answer
No product will be formed when the enzyme is mixed with substrate Q because the shape of the active site of the enzyme does not complement the shape of substrate Q. Therefore, they cannot bind effectively. This lack of binding prevents the enzyme from catalyzing the reaction, resulting in no product formation.