The graph illustrates how raising substrate concentration affects the rate of an enzyme-catalysed reaction. What is limiting the rate of the enzyme-catalysed reaction at 1, 2, 3 and 4 on the graph?
- A1 enzyme concentration; 2 substrate concentration; 3 competitive inhibitor; 4 non-competitive inhibitor
- B1 enzyme concentration; 2 substrate concentration; 3 non-competitive inhibitor; 4 competitive inhibitor
- C1 substrate concentration; 2 enzyme concentration; 3 competitive inhibitor; 4 non-competitive inhibitor
- D1 substrate concentration; 2 enzyme concentration; 3 non-competitive inhibitor; 4 competitive inhibitor