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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 3 cm³ of pectinase was added.
Answer
To estimate the volume of apple juice produced with 3 cm³ of pectinase, we can observe the trend in the data provided. The volumes of juice produced appear to increase approximately in a linear fashion with the volume of pectinase added. From the table:
- 1 cm³ produces 180 cm³ of juice
- 2 cm³ produces 212 cm³ of juice
- 3 cm³ can be estimated to produce:
Using linear extrapolation, we see the increments:
- From 1 to 2 cm³: 212 - 180 = 32 cm³
- From 2 to 3 cm³:
If we assume similar increments, we could expect 32 cm³ more than 212 cm³:
212 + 32 = 244 cm³.
Therefore, we can estimate that when 3 cm³ of pectinase is added, approximately 240 to 250 cm³ of apple juice should be produced.
Step 2
Calculate the percentage of apple juice produced when 5 cm³ of pectinase was added.
Answer
From the table, when 5 cm³ of pectinase is added, the volume produced is expected to be around 300 cm³ (not provided but deduced). The maximum volume of apple juice obtainable from 1 kg of apples is 500 cm³.
To find the percentage of juice produced:
egin{align*}
ext{Percentage} & = rac{ ext{Volume produced}}{ ext{Maximum volume}} imes 100
& = rac{300 ext{ cm}³}{500 ext{ cm}³} imes 100
& = 60
ext{(60 ext{ ext{%}})}
ext{Therefore, the percentage of apple juice produced when 5 cm³ of pectinase was added is } 60 ext{ ext{ %}}.