1 (a) Pathogens cause disease - Edexcel - GCSE Biology Combined Science - Question 1 - 2018 - Paper 1
Question 1
1 (a) Pathogens cause disease.
Draw one straight line from each type of pathogen to the disease that is caused by that pathogen.
| type of pathogen | disease |
| -... show full transcript
Worked Solution & Example Answer:1 (a) Pathogens cause disease - Edexcel - GCSE Biology Combined Science - Question 1 - 2018 - Paper 1
Step 1
Draw one straight line from each type of pathogen to the disease that is caused by that pathogen.
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Answer
Fungus: Tuberculosis
Virus: AIDS
Virus: Malaria
Bacteria: Cholera
Fungus: Chalara ash dieback
Step 2
Explain why the data suggests that Patient Z has a bacterial infection.
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Answer
Patient Z has the highest number of white blood cells (12500 cells/µl) among the three patients, which is significantly above the normal range. Elevated white blood cell counts, especially in the context of the other patients' lower counts, often indicate a bacterial infection as the body responds to fight off infection.
Step 3
State two safety precautions that need to be taken when handling blood samples.
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Wear gloves and goggles to protect against exposure.
Dispose of samples safely, especially sharps and biohazard materials.
