Explain why a plant kept in a dark cupboard for several days will eventually die.

Model answer (4 marks)

Examiner tips

• Use the exact wording from the mark scheme – e.g. "photosynthesis cannot occur" and "cannot make new cell components".
• Show the logical sequence: darkness → no photosynthesis → no glucose → no energy → no growth → death.
• Keep each point short and to the point, matching the four marks.

Common mistakes

• Writing that the plant dies because it runs out of water or oxygen instead of glucose.
• Using vague phrases like "lack of light" without linking to photosynthesis.
• Including unnecessary details such as chlorophyll structure or photosystem reactions.