All enzymes are …………. molecules

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Presentation transcript:

All enzymes are …………. molecules ENZYMES factsheet Why are enzymes called ‘biological catalysts? Give 3 examples of chemical reactions in living cells catalysed by enzymes All enzymes are …………. molecules LOCK and KEY MODEL Draw a fully labelled diagram of this model Describe the model using the words ‘substrate’ and ‘active site’ Why are enzymes specific?

Draw a diagram to show an enzyme denaturing EFFECT OF TEMPERATURE 0 Temperature 80 Complete the graph with a curve to show the effect of temperature on an enzyme controlled reaction. Describe the effect of increasing the temperature from 10 to 40 oC and explain your answer using words ‘collisions’, ‘movement’ and ‘kinetic energy’ Describe the effect of increasing the temperature from 40 to 80 oC Draw a diagram to show an enzyme denaturing Explain why an enzyme cannot work after it has denatured and why it is irreversible Rate of enzyme reaction EFFECT OF pH 2 PH 11 Complete the graph with a curve to show the effect of temperature on an enzyme controlled reaction. Rate of enzyme reaction What does optimum pH mean? What happens to enzymes at extreme pH’s?