The graph shows the rate of catalysis versus pH for an enzyme-catalyzed reaction.What conclusion can be made from the graph?
A)The enzyme is completely denatured by pHs greater than 8 or less than 5.
B)The substrate has four ionizable groups.
C)At pH 6.2 all ionizable groups in the active site are protonated.
D)The enzyme has an acidic and a basic amino acid in the active site.
E)The enzyme has only one protonatable residue in the active site.

Question

The graph shows the rate of catalysis versus pH for an enzyme-catalyzed reaction.What conclusion can be made from the graph? 
A)The enzyme is completely denatured by pHs greater than 8 or less than 5. 
B)The substrate has four ionizable groups. 
C)At pH 6.2 all ionizable groups in the active site are protonated. 
D)The enzyme has an acidic and a basic amino acid in the active site. 
E)The enzyme has only one protonatable residue in the active site.

Quizplus · Accepted Answer

The Answer of The graph shows the rate of catalysis versus pH for an enzyme-catalyzed reaction.What conclusion can be made from the graph? 
A)The enzyme is completely denatured by pHs greater than 8 or less than 5. 
B)The substrate has four ionizable groups. 
C)At pH 6.2 all ionizable groups in the active site are protonated. 
D)The enzyme has an acidic and a basic amino acid in the active site. 
E)The enzyme has only one protonatable residue in the active site.

The Graph Shows the Rate of Catalysis Versus PH for an Enzyme-Catalyzed