The enzyme catalase catalyses the decomposition of hydrogen peroxide into water and oxygen. In an investigation of how pH affects the rate of reaction of catalase, potato cubes were placed into hydrogen peroxide. Which dependent variable should be measured and recorded?
- Athe change in mass of the potato after a given time
- Bthe pH of the solution at regular time intervals
- Cthe number of potato cubes added at the start
- Dthe volume of oxygen given off at regular time intervals