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Using enzymes Pectinase is an enzyme that is used to extract juice from apples - Edexcel - GCSE Biology - Question 6 - 2015 - Paper 1
Question 6
Using enzymes Pectinase is an enzyme that is used to extract juice from apples. In an investigation, 1 cm³ of pectinase was added to 1 kg of chopped apples. After... show full transcript
Worked Solution & Example Answer:Using enzymes Pectinase is an enzyme that is used to extract juice from apples - Edexcel - GCSE Biology - Question 6 - 2015 - Paper 1
Step 1
Estimate the volume of apple juice that should be produced when 3cm³ of pectinase was added.
Answer
To estimate the volume of apple juice produced with 3 cm³ of pectinase, we can look at the values provided in the table. The produced volume increases with the amount of pectinase used. From the data:
- 1 cm³ of pectinase produces 180 cm³ of juice.
- 2 cm³ of pectinase produces 212 cm³ of juice.
- 3 cm³ of pectinase will likely produce an amount between the values for 2 cm³ (212 cm³) and 4 cm³ (300 cm³).
A reasonable estimate for 3 cm³ of pectinase might be around 250 cm³.
Step 2
Calculate the percentage of apple juice produced when 5 cm³ of pectinase was added.
Answer
The volume of apple juice produced when 5 cm³ of pectinase is added is assumed to be around 300 cm³ based on the table. To calculate the percentage of apple juice produced from the maximum possible volume (500 cm³), we can use the following formula:
Substituting the values gives us:
Thus, the percentage of apple juice produced when 5 cm³ of pectinase was added is 60%.