Cambridge IGCSE Biology practice

Paper 3 structured question: Cell structure

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Paper

Marks

Topic

Cell structure

Exam-style question

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Paper 3Theory (Core)2 marks

Bacteria are simple cells with several key structures that allow them to survive and reproduce.

Diagram Description

The diagram shows a bacterial cell with labels pointing to the cell wall, cell membrane, cytoplasm, ribosomes, circular DNA, and plasmids.

Label	Function
Cell wall	Provides shape and protection
Cell membrane	Controls movement of substances
Cytoplasm	Site of chemical reactions
Ribosomes	Make proteins
Circular DNA	Contains genetic information
Plasmids	Carry extra genes

a
Describe Describe the function of the cell wall in a bacterial cell.
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Aim for approximately 2 distinct marking points.
[2]

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Paper 3Theory (Core)2 marks

Description

A bacterial cell includes a cell membrane, cytoplasm, ribosomes, circular DNA, plasmids, and a cell wall.

a
Identify Identify two structures in a bacterial cell where DNA is found.
Your answer
Aim for approximately 2 distinct marking points.
[2]