The following graph shows the activity versus pH curves for pepsin, sucrase, and trypsin. Estimate the optimum pH for each.
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Question

The following graph shows the activity versus pH curves for pepsin, sucrase, and trypsin. Estimate the optimum pH for each.

Accepted Answer

Welcome back everyone. The graph below illustrates the relationship between enzyme activity and Ph for catalase peptidase and cellulose based on the graph which of the following optimal Ph is correct. So we're given the graph and there are also four answer choices. A states that it is catalyse ph 7.0 B states that it is peptidase with a PH of 5.5 C states, cellulose, ph 6.5 and D states peptidase ph of 8.0. What we can see from the given chart is that it gives us the reaction rate on the vertical axis and Ph on the horizontal axis. So we are given a dependence graph and simply we want to identify the highest reaction rate and we want to identify what type of Ph, we get that highest reaction rate. Now let's look at the legend. And first of all, we're given catalyse, right? It is the blue curve. And basically what we want to do is identify the maximum of the reaction rate. And then we want to draw a vertical line to identify the Ph. So Ph is between seven and eight, right? It's about 7.1 perhaps 7.2 let's label it as 7.1. Now, for pep days, which is the red curve, we can identify the maximum. And now let's find the ph. So now we can clearly see that it's at around 6.9 right? It is slightly lower than seven. And finally, cellulose, which is the orange curve. We can see that the highest reaction rate is at a ph of around 6.1. So now when we look at the answer choices, we can see that catalyse with a ph of seven would be the correct answer, right? We can clearly see that it's at around 7.1. So 7.0 is really, really close to the optimal Ph. Now, Pep's ph of 5.5. Well, essentially, if we look at the legend, that's the red curve and the red curve has an optimal Ph of 6.9 which is not even close to 5.5. And we can exclude option B. Now cellulose at ph of 6.5. Well, essentially, we can clearly see that we have a value of 6.9. Once again, 6.5 is slightly lower, right? And peptidase at ph of eight, while we already know that the optimal PH is at around 6.1 and 8.0 is really far away. So it's not the the correct answer. Meaning A is the correct choice. It's catalase at ph of seven. Thank you for watching.

The following graph shows the activity versus pH curves for pepsin, sucrase, and trypsin. Estimate the optimum pH for each.
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Verified video answer for a similar problem:

Key Concepts

Enzyme Activity

pH and Enzyme Function

Optimum pH

The following graph shows the activity versus pH curves for pepsin, sucrase, and trypsin. Estimate the optimum pH for each.<IMAGE>

Verified video answer for a similar problem:

Key Concepts

Enzyme Activity

pH and Enzyme Function

Optimum pH

The following graph shows the activity versus pH curves for pepsin, sucrase, and trypsin. Estimate the optimum pH for each.
<IMAGE>