Activity of various enzymes at various temperatures a) and at various pH b). Use the image above to answer the following
questions).
-Which temperature and pH profile curves on the graphs were most likely generated from analysis of an enzyme from a human stomach where conditions are strongly acid?

Question

Quizplus · Accepted Answer

The curves that would best represent an enzyme from a strongly acidic environment (like the human stomach) would be those with a low pH optimum, and that can function at higher temperatures. Curve 1 has a low pH optimum, but a lower temperature range, indicating that it may be from an environment that is cooler than the human stomach. Curve 2 has a high temperature range, but a pH optimum that is neutral, indicating that it may be from an environment that is not as acidic as the human stomach. Curve 3 has a higher pH optimum, indicating that it may be from an environment that is less acidic than the human stomach. Curve 4 has a low pH optimum and a high temperature range, which would be consistent with an enzyme from the human stomach. Curve 5 has a low pH optimum, but a lower temperature range, indicating that it may be from an environment that is cooler than the human stomach. Therefore, the best choice is B, which includes curves 1 and 4.

Activity of Various Enzymes at Various Temperatures A) and at Various