Using a microscopy observation, explain how a student should answer this AQA A-Level Biology objective: Explain roles of tumour suppressor genes and oncogenes in tumour development.

A strong response identifies the evidence, explains the biological mechanism for Explain roles of tumour suppressor genes and oncogenes in tumour development, and links the evidence to Explain roles of tumour suppressor genes and oncogenes in tumour development. gene vs allele: a gene is a DNA locus for a product, whereas an allele is one version of that locus.

This works because the answer is anchored to Explain roles of tumour suppressor genes and oncogenes in tumour development.: it names the biological idea, applies it within Gene expression and cancer, and links the evidence to a consequence. This is exam-style because it requires evidence-based reasoning rather than option selection, and it keeps the response anchored to Explain roles of tumour suppressor genes and oncogenes in tumour development. For exam-style wording, develop the link between structure, function and consequence rather than stopping after a definition.