IB skill practice

Explain cell respiration and ATP transfer

Paper 1, Paper 2 5 marks Difficulty 4

Compare aerobic and anaerobic respiration

A muscle-cell scenario in a Auckland food-test practical shows ATP still being produced when oxygen is limited, but much less than with oxygen. Identify the pathway type and explain the lower yield. Enter the answer and choose the interpretation that best matches the biological evidence.

Worked practice: biological evidence and answer

Use the labelled biological evidence first, then connect it to the final answer.