The flow diagram is about Edward Jenner's work on vaccines - Edexcel - GCSE Biology - Question 2 - 2013 - Paper 1
Question 2
The flow diagram is about Edward Jenner's work on vaccines.
Jenner collected pus containing the cowpox virus from the hand of a milkmaid.
He put the cowpox virus i... show full transcript
Worked Solution & Example Answer:The flow diagram is about Edward Jenner's work on vaccines - Edexcel - GCSE Biology - Question 2 - 2013 - Paper 1
Step 1
Use words from the box to complete the sentences about vaccines.
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Answer
The cowpox virus from the milkmaid caused the boy to become immune to smallpox.
His body produced antibodies which stopped the smallpox virus from causing an infection.
Step 2
Suggest why a parent might decide not to have their child immunised.
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Answer
A parent might decide not to have their child immunised due to concerns regarding side effects of vaccinations or allergic reactions that may occur. Additionally, they may believe their child might be unlikely to catch the disease due to already having antibodies or herd immunity.
Step 3
Draw the curve of best fit on the graph.
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Answer
The curve of best fit should be a smooth curve that passes through all the points plotted on the graph, connecting the data points in a way that exemplifies the growth trend.
Step 4
Use your curve of best fit to estimate the number of bacteria at four hours.
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Answer
Estimating from the curve, the number of bacteria at four hours is approximately 10,000 to 25,000.
Step 5
Describe the trend shown in the graph.
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Answer
The trend shown in the graph indicates that the number of bacteria increases over time, suggesting rapid growth over the five-hour period.
Step 6
Describe the optimum conditions for the rapid growth of bacteria.
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Answer
The optimum conditions for the rapid growth of bacteria include being in a warm environment, having a moist environment, maintaining a correct pH, and ensuring a supply of nutrients is available.
