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Cambridge IGCSE Combined Science practice

Paper 3 structured question: Cell structure

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Cell structure

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Paper 3Theory (Core)3 marks

Bacterial cells are essential for various ecological processes.

Description

Bacterial Cell Structure

Bacterial cells have several key components: a cell wall, cell membrane, cytoplasm, ribosomes, circular DNA, and plasmids. Each of these components plays a crucial role in the cell's function and survival.

  1. a

    Outline the structure of a bacterial cell, including its main components.

    Aim for approximately 3 distinct marking points.

    [3]

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Paper 3 structured question: Cell structure

Paper 3Theory (Core)2 marks

Description

Components of Bacterial Cells

Bacterial cells are characterized by their simple structure, which includes a cell wall, cell membrane, cytoplasm, ribosomes, circular DNA, and plasmids. Each component has a specific function that contributes to the overall operation of the cell.

  1. a

    Describe the function of plasmids in bacterial cells.

    Aim for approximately 2 distinct marking points.

    [2]