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Cambridge IGCSE Combined Science practice

Paper 4 structured question: Diseases and immunity

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Attempt questionDiseases and immunity revisionRevise the key idea

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Diseases and immunity

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Paper 4Theory (Extended)2 marks

Characteristics of viruses are important in understanding their behavior and impact on health.

Description

Characteristics of Viruses

Viruses are made up of a protein coat and genetic material, which can be either DNA or RNA. They lack cellular structures and cannot reproduce independently.

  1. a

    Describe the main components of a virus and their functions.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 4 structured question: Diseases and immunity

Paper 4Theory (Extended)3 marks

Description

Viral Structure

Viruses are composed of a protein coat and either DNA or RNA as their genetic material. They are acellular and require a host to replicate.

  1. a

    Explain why viruses are considered acellular and how this affects their replication.

    Aim for approximately 3 distinct marking points.

    [3]