12. The figure shows the relationship between enzyme and substrate molecule concentration on rate of reaction. Rate of reactions Substrate molecule a) State the lock - and - key hypothesis which govern the rate of enzyme controlled reactions. 2mks 2mks b) Explain the effect of enzyme inhibitors on enzyme controlled reactions. c) i) Identify the limiting factor(s) at Q 1mk ii) Other than enzyme inhibitors, state other factors that would limit enzyme controlled reaction. 2mks