FBISE, NCP & NBF-aligned resources for Classes 9–12
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Biology Chapter 6 : Topic 7
Classification of Viruses
1 / 15
Why are viruses difficult to classify?
Reasoning: Viruses exhibit characteristics of both living and non-living things, making classification difficult.
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Which feature of viruses creates a major complication in their classification?
Reasoning: Most classification systems are based on cellular organisms, but viruses lack cells.
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Why are viruses often considered non-living outside a host cell?
Reasoning: Outside a host, viruses remain inactive and cannot carry out life processes.
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Which characteristic makes viruses resemble living organisms?
Reasoning: Viruses can reproduce, but only within living host cells.
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Which characteristic makes viruses resemble non-living matter?
Reasoning: Viruses can be crystallized, a property associated with non-living substances.
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Viruses are not included in the Five-Kingdom Classification mainly because they:
Reasoning: The Five-Kingdom System classifies cellular organisms, while viruses are acellular.
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Which statement best describes the position of viruses in classification?
Reasoning: Viruses do not fit neatly into standard classification systems.
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Which of the following is a living characteristic of viruses?
Reasoning: Reproduction is a key characteristic of living organisms.
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Which of the following is a non-living characteristic of viruses?
Reasoning: Outside host cells, viruses remain inert and cannot perform life processes.
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Viruses are often called obligate parasites because they:
Reasoning: Viruses require a living host cell to reproduce.
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Which feature prevents viruses from being classified as typical cells?
Reasoning: Viruses do not possess cellular components such as cytoplasm or organelles.
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A virus outside a host cell is unable to:
Reasoning: Viruses cannot perform metabolic activities independently.
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Which characteristic is common to both viruses and living organisms?
Reasoning: Viruses can reproduce, but only within host cells.
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Why do scientists debate whether viruses are living or non-living?
Reasoning: Viruses possess a mixture of living and non-living features.
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Which feature is NOT responsible for classification difficulties of viruses?
Reasoning: Having genetic material does not itself create classification complications. -----------------------------------------------------------------------
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