Figure 6.3 Activity of various enzymes (a) at various temperatures and (b) at various pH.
-Which temperature and pH profile curves on the graphs in Figure 6.3 were most likely generated from analysis of an enzyme from a human stomach, where conditions are strongly acid?
A) curves 1 and 4
B) curves 1 and 5
C) curves 2 and 4
D) curves 2 and 5
E) curves 3 and 4

Question

Figure 6.3 Activity of various enzymes (a) at various temperatures and (b) at various pH.
-Which temperature and pH profile curves on the graphs in Figure 6.3 were most likely generated from analysis of an enzyme from a human stomach, where conditions are strongly acid?
A) curves 1 and 4 
B) curves 1 and 5 
C) curves 2 and 4 
D) curves 2 and 5 
E) curves 3 and 4

Quizplus · Accepted Answer

The enzyme from a human stomach is most likely to have a pH optimum in the acidic range, as the stomach environment is strongly acidic. Curves 1 and 4 show a pH optimum in the acidic range, so they are the most likely to have been generated from analysis of an enzyme from a human stomach.

Figure 63 Activity of Various Enzymes (A) at Various Temperatures and and (B)