A student measures the rate at which lipase breaks down lipid at its optimum temperature. The results are shown in the table.
| Lipid concentration in % | Rate of reaction in arbitrary units |
|---|---|
| 1.0 | 7 |
| 2.0 | 13 |
| 4.0 | 21 |
| 6.0 | 22 |
| 8.0 | 22 |
Which statement best explains the pattern in these results?
The rate rises as more lipid collides with lipase, until every active site is occupied.
The rate rises as more lipid collides with lipase, until the lipid denatures the lipase.
The rate rises as more lipid collides with lipase, until products stay in the active sites.
The rate rises as more lipid collides with lipase, until all the lipase is used up.
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.