K.C.S.E Biology Q & A - MODEL 2001PP1QN12

K.C.S.E Biology Q & A - MODEL 2001PP1QN12

The graph below shows the effect of substance concentration of the rate of enzyme reaction.

(a) (i) Account for the shape of the graph between A and B
(ii) B and C
(b) How can the rate of reaction be increased after point B?
(c) State two other factors that effect the rate of reaction of enzyme reaction

answers

(a) (i)  More active sites of enzymes available, for  a large number of molecules of substrate; hence increase in the rate of reaction  ( rapid of fast increase in the rate  of reaction)
(ii) B and C
Enzymes/ substrate are in equilibrium / All active sites are occupied;  hence rate of reaction is constant.
(b) Raising concentration of enzymes
(c) PH, temperature, inhibitors/ cofactors