A student investigates the breakdown of hydrogen peroxide by catalase.
The table shows the total volume of oxygen collected.
Table
| Time in min\text{min}min | Total volume of oxygen collected in cm3\text{cm}^3cm3 |
|---|---|
| 0 | 0 |
| 1 | 12 |
| 2 | 22 |
| 3 | 28 |
| 4 | 30 |
What is the mean rate of oxygen production between 1 minute and 3 minutes?
8.0 cm3/min8.0\ \text{cm}^3/\text{min}8.0 cm3/min
9.3 cm3/min9.3\ \text{cm}^3/\text{min}9.3 cm3/min
14 cm3/min14\ \text{cm}^3/\text{min}14 cm3/min
16 cm3/min16\ \text{cm}^3/\text{min}16 cm3/min
184 exam-style questions on OCR GCSE Biology 1.2 What happens in cells (and what do cells need)?, covering 1.2.1 Structure of DNA, 1.2.2 Nucleotides and complementary bases, 1.2.3 Protein synthesis, 1.2.4 DNA structure and the proteins made, 1.2.5 Investigating enzymatic reactions, and 1.2.6 Mechanism of enzyme action. Each one has a worked solution and a mark scheme showing where the marks go.