Some bacteria cause disease - Edexcel - GCSE Biology - Question 1 - 2022 - Paper 1
Question 1
Some bacteria cause disease.
(a) Which word describes an organism that causes disease?
(1)
A. pathogen
B. culture
C. antibiotic
D. platelet
(b) Draw one straight ... show full transcript
Worked Solution & Example Answer:Some bacteria cause disease - Edexcel - GCSE Biology - Question 1 - 2022 - Paper 1
Step 1
Which word describes an organism that causes disease?
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Answer
The correct word is 'A. pathogen'. A pathogen is an organism that causes disease.
Step 2
Draw one straight line from each disease to the main way that the disease is spread.
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Answer
For cholera, the main way it is spread is 'in water'. For malaria, it is spread 'by animal vectors'.
Step 3
Plot the points on the graph for the number of bacteria at 10°C.
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Answer
Carefully plot the points based on the data provided in Figure 1. Make sure to mark each point accurately.
Step 4
Draw a line of best fit on the graph for 10°C.
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Answer
A line of best fit should be drawn that represents the trend of the plotted points for 10°C. Ensure it reflects the overall direction of the data points.
Step 5
Describe how the growth of bacteria at 10°C was different from the growth of bacteria at 20°C.
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Answer
At 10°C, the growth of bacteria is slower compared to 20°C. Additionally, the growth pattern at 10°C is linear, whereas at 20°C, it shows a more pronounced increase. The differences in bacteria numbers must be reflected in thousands, indicating that 10°C does not level off as quickly as the growth at 20°C.
