A-LevelBiologyEnzymes9700/12 · May/June 2013 · Q141 Mark

Two pairs of students each counted the number of bubbles of oxygen given off in an experiment investigating the effect of catalase from plant tissue on hydrogen peroxide. Each pair repeated the experiment five times and calculated the mean number of bubbles per minute. Which have correctly calculated the mean?

A1, 3 and 4 only

B1 and 4 only

C2 only

D3 only

✓ Correct answer

C: 2 only

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