A student investigates the effect of temperature on the rate of an enzyme-controlled reaction.
The Table shows the results.
Table
| Temperature in ∘C^\circ\text{C}∘C | Rate of reaction in arbitrary units |
|---|---|
| 10 | 5 |
| 20 | 12 |
| 30 | 22 |
| 40 | 30 |
| 50 | 14 |
| 60 | 0 |
Give the temperature at which the rate of reaction was highest.
Describe how the rate of reaction changes as the temperature increases from 10 ∘C10\ ^\circ\text{C}10 ∘C to 60 ∘C60\ ^\circ\text{C}60 ∘C.
At 60 ∘C60\ ^\circ\text{C}60 ∘C the rate of reaction is zero.
Name the term used to describe what has happened to the enzyme.
Give one variable the student should keep the same in this investigation.
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.