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Cambridge IGCSE Biology practice

Paper 4 structured question: Chromosomes, genes and proteins

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Chromosomes, genes and proteins

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Paper 4Theory (Extended)1 marks

Proteins are made from amino acids linked in a chain. The sequence of amino acids varies between proteins.

Description

Amino Acid Sequence Variation

Different proteins have different sequences of amino acids, which affects their structure and function.

  1. a

    State what causes proteins to be different from each other.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 4 structured question: Chromosomes, genes and proteins

Paper 4Theory (Extended)4 marks

Description

Protein Structure and Function

Changes in the amino acid sequence can alter the protein's shape and function.

  1. a

    Explain how variations in amino acid sequences lead to different proteins.

    Aim for approximately 4 distinct marking points.

    [4]