What name is given to microorganisms that cause disease?
Tick (✓) one box - AQA - GCSE Biology - Question 2 - 2021 - Paper 1
Question 2
What name is given to microorganisms that cause disease?
Tick (✓) one box.
Pathogens
Predators
Prokaryotes
How do viruses cause the symptoms of disease?
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Worked Solution & Example Answer:What name is given to microorganisms that cause disease?
Tick (✓) one box - AQA - GCSE Biology - Question 2 - 2021 - Paper 1
Step 1
What name is given to microorganisms that cause disease?
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Answer
The name given to microorganisms that cause disease is pathogens.
Step 2
How do viruses cause the symptoms of disease?
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Answer
Viruses cause the symptoms of disease by reproducing inside cells, damaging them.
Step 3
Suggest one reason why viruses are not classed as cells.
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Answer
Viruses are not classed as cells because they do not have a cell membrane.
Step 4
Which graph shows how the concentration of antibodies in a person’s blood changes after the first and second vaccinations?
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Answer
The correct graph would show a rise in antibody concentration following each vaccination, indicating an immune response.
Step 5
Which part of a plant shows discolouration caused by TMV?
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Answer
The part of the plant that shows discolouration caused by TMV is the leaf.
Step 6
Complete Figure 5.
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Answer
In Figure 5, label the y-axis as rate of photosynthesis in arbitrary units, ensuring it has the correct scale. Plot the data from Table 1 accurately and label each bar clearly.
Step 7
What conclusion can be made from the data in Table 1?
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Answer
The conclusion that can be made from the data in Table 1 is that as the level of infection from TMV increases, the rate of photosynthesis decreases.
Step 8
Explain why a high level of TMV infection reduces growth in a plant.
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Answer
A high level of TMV infection reduces growth in a plant because it leads to less chlorophyll production, resulting in lower rates of photosynthesis, which in turn decreases energy availability for growth.
