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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)4 marks

Proteins perform many functions in living organisms. Their function depends on their shape, which is determined by the amino acid sequence.

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]

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Paper 4 structured question: Chromosomes, genes and proteins

Paper 4Theory (Extended)1 marks

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]