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 immunise their child due to concerns about potential side effects from the vaccine, such as allergic reactions or fear of needles. Additionally, they may believe their child has already had the disease and is therefore immune, or they may feel that the vaccine is unnecessary.
Step 3
Draw the curve of best fit on the graph.
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Answer
A smooth curve should be drawn through all the data points on the graph, illustrating the growth of the bacteria over time.
Step 4
Use your curve of best fit to estimate the number of bacteria at four hours.
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Answer
The estimated number of bacteria at four hours is between 10,000 and 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.
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 a warm temperature, moist environment, correct pH, and a sufficient supply of nutrients.
