At moderate temperatures, most enzyme catalyzed reactions would
occur a _____ rate than the same reaction in the absence of
enzymes. A)faster B)slower C)neither the reactions would occur at
the same rate

Each enzyme can catalyze a large number of different of
reactions. Thus, cell function depends only on the total number of
enzymes molecules present rather than the specific composition of
enzymes. A)True B)False

Many reaction in cells are reversible. WHen a reaction is
reversed, it is always the same enzyme that catalyzes the reaction
in each direction. A)True B)False

Reactions carried out by enzymes are always limited by the
concentration of reactants rather than the concentration of
enzymes. A)True B)False

In human cells, when oxygen is absent, NADH is used to reduce.
A)pyruvic acid to lactic acid B)lactic acid to pyruvic acid
C)pyruvic acid to carbon dioxide D)carbon dioxide to pyruvic acid
E)pyruvic acid to acetyl CoA