General ---------Biology----------------------------------------------------- ------------------Online-------------------------------------- Ch. 9 Cellular Respiration: Harvesting Chemical Energy

Fig. 9.9, pg. 154-155, illustrates glycolysis.  Review the Figure and answer the following questions.

In what steps of the pathway does ATP phosphorylate substrate molecules? 1  &  3
In what steps is ADP phosphorylated, producing ATP? 7  &  10
How many ATP are invested in breaking down glucose?   two
How many ATP molecules are produced* by glycolysis? four  *

*  Notice the little "2" in the upper left hand corner of the white boxes containing molecules on page 155.  This means there are two molecules proceeding through the pathway after step 4.

What is the ATP "profit" of glycolysis?  two