The most likely explanation for the results shown in Graph I is that:

Question

#40 For this question, I originally picked D, but it is not the right answer. I am really confused on how to solve this problem. I would like to know why D isn't correct, along with the other wring answers, and why the right answer is correct.

 

I am also unsure of questions 38 and 39.

 

 This problem includes graphs that I cannot recreate on WyzAnt, so I had to take a picture and post it on another site.

 

http://s1195.photobucket.com/user/BirdySweet/media/IMG_6746_zpsxzdqx9ut.jpg.html?sort=3&o=1

 

Answer 1

For Q 40:

 

The graph shows decline in enzyme activity with rise in pH, it does not provide any indication of enzyme structure. An enzyme with slightly defective structure but intact active site can still work, perhaps less efficiently. The graph in question shows diminishing enzyme activity with increasing pH indicating that increased alkaline phase is negatively affecting activity and therefore, D is incorrect.

 

For other 2 questions:

 

Graph IV shows the similar maximum activity at any pH, the activity is constant with rising pH

 

Similarly other graphs show optimal maximum enzyme activity at particular pH, acidic or alkaline.

 

Hope this helps.