1.4 Pathogens, including viruses
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Which statement about viruses is correct?
(1)Total for this question: 1 mark
1(b) VARIETY OF LIVING ORGANISMS · EXAM QUESTIONS
1.4 Pathogens, including viruses
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1.4 Pathogens, including viruses
Exam question
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Which virus prevents chloroplasts forming in the leaves of tobacco plants?
(1)Total for this question: 1 mark
1.4 Pathogens, including viruses
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Which disease is caused by a protoctist?
(1)Total for this question: 1 mark
1.4 Pathogens, including viruses
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Which correctly matches the pathogen to the group it belongs to?
(1)Total for this question: 1 mark
1.4 Pathogens, including viruses
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Which substance makes up the coat of a virus?
(1)Total for this question: 1 mark
1.4 Pathogens, including viruses
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Which is the correct order of size, from smallest to largest?
(1)Total for this question: 1 mark
1.4 Pathogens, including viruses
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Give three ways in which a virus is different from a bacterium.
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Total for this question: 3 marks
1.4 Pathogens, including viruses
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Explain why a virus cannot be grown in a dish of nutrient agar on its own.
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Total for this question: 2 marks
1.4 Pathogens, including viruses
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State what is meant by the term pathogen.
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Total for this question: 1 mark
1.4 Pathogens, including viruses
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Describe the structure of a virus.
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Total for this question: 3 marks
1.4 Pathogens, including viruses
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Tobacco mosaic virus causes yellow patches on tobacco leaves. Explain why infected plants grow more slowly.
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Total for this question: 3 marks
1.4 Pathogens, including viruses
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Give two examples of pathogens from different groups.
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Total for this question: 2 marks
1.4 Pathogens, including viruses
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A plant disease is spreading in a field of maize. Suggest two ways a scientist could find out whether the pathogen is a fungus or a virus.
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Total for this question: 2 marks
1.4 Pathogens, including viruses
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Explain why viruses are described as parasitic.
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Total for this question: 2 marks
1.4 Pathogens, including viruses
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HIV infects human white blood cells. Explain why HIV is described as a pathogen but not as a living organism.
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Total for this question: 4 marks