IB Biology Internal Assessment Exemplar: What is the effect of 10 ml (±0.1 ml) of different concentrations of contraceptive solutions (0.000, 0.006, 0.012, 0.018, 0.024, 0.030%) on the activity of catalase enzymes extracted from 5g (±0.01g) of cow liver tissue, when reacted with 5 ml (± 0.1 ml) of hydrogen peroxide, measured by the percentage of oxygen gas produced after 1 min (± 0.1 s) using an oxygen probe (± 2%)? | RevisionDojo