Edexcel IGCSE Biology 4.12 Air pollution consequences
Practise air pollution questions on sulfur dioxide, carbon monoxide, acid rain, lichens and biological effects on organisms or humans.
- Syllabus
- First assessment 2019
- Course
- Biology 4BI1
Exam points
- explain how sulfur dioxide forms acid rain and damages plants, fish or ecosystems
- describe carbon monoxide binding to haemoglobin and reducing oxygen transport
- interpret lichen coverage tables as evidence for pollution changing with distance from traffic
4.12 Air pollution consequences question 1
[Maximum number: 2]
The atmosphere can be polluted by gases such as carbon monoxide released from industry.
Describe the effects of carbon monoxide on the human body.
An explanation that makes reference to two of the following:
- combines with haemoglobin / forms carboxyhaemoglobin / eq
- prevents oxygen transport / less oxyhaemoglobin / oxygen cannot bind haemoglobin / eq
- less respiration / more anaerobic respiration / less energy released / more lactic acid formed / eq
Accept forms carboxyhaemoglobin rather than oxyhaemoglobin for 2 marks
Accept binds to haemoglobin instead of oxygen for 2 marks
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