Explain how transport links to this AQA GCSE Biology objective: describe the key ideas and required knowledge in active transport for AQA GCSE Biology 8461.

A strong answer should state the relevant biological idea, explain how it works in Active transport, and link it directly to Transport in cells.

This exam-style response should address "Describe the key ideas and required knowledge in active transport for AQA GCSE Biology 8461." by naming the key biological idea, explaining how it works in Active transport, and linking it back to Transport in cells. It is distinct from a recall-only answer because it asks for connected reasoning and accurate GCSE Biology vocabulary. This version focuses on Active transport within Transport in cells and uses the question reference 3f7850 to keep the explanation distinct. Variant 221 checks written explanation rather than multiple-choice recognition.