All enzymes have an optimum ph. in short, some enzymes can only function within a
narrow range of ph values; in contrast, a few enzymes can function in a broad range of
ph values. see the graph of pepsin and arginase in the follow-up questions. thus, an
enzyme that has specific ph requirements will have a
slope
(describe the slope). in contrast, an enzyme that can function in a range of ph values
will have a
_slope (describe the slope).