Question

9) It turns out that cells are able to turn glycolysis on or off according to its needs in other words, cells can regulate glycolysis). (a) It would make more sense for a cell to turn on glycolysis whenever it (needs or already has plenty of ) ATPs. (b) Briefly explain your answer to part a. (c) It would make more sense for a cell to turn off glycolysis whenever it (needs or already has plenty of ATPs. (d) ATP molecules can bind to ( 1 or 2 or more than 2) sites on the phosphofructokinase enzyme. (e) If there is only a small amount of ATP in a cell, it would...circle your answer. 1. allow the phosphofructokinase enzyme to catalyze step 3 of glycolysis. ii prevent the phosphofructokinase enzyme from catalyzing step 3 of glycolysis. (1) If there is already a lot ATP in a cell, it would...circle your answer. Hint: You should be able to answer this question just by looking at the diagram above. I. allow the phosphofructokinase enzyme to catalyze step 3 of glycolysis. il prevent the phosphofructokinase enzyme from catalyzing step 3 of glycolysis. (g) Suppose that the phosphofructokinase enzyme was made inactive (so that it could no longer catalyze step 3 of glycolysis). This would cause a ( increase or decrease) in the amount of ATP produced via glycolysis.

Answer 1

9. A-

Cell synthesize ATP by the process of glycolysis. So, a cell performs glycolysis to make ATP. A cell turns on glycolysis if it needs ATP.

B- As ATP is synthesized by glycolysis so the cell turns it on when it needs ATP.

C- A cell turns off glycolysis when it has plenty of ATPs.

D- ATP binds at 2 sites in phosphofructokinase.

E. It would allow the phosphofructokinase to start step 3 as one site is empty for the substrate.

F. It would prevent phosphofructokinase from starting step 3 as the substrate cannot bind at the site.

G- In this ATP will decrease as glycolysis will not proceed.

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