Which characteristic best distinguishes glycolysis and the krebs cycle from the electron transport chain?
a. the amount of atp produced
b. the location in which they occur
c. whether glucose is broken down
d. whether they occur in plants or animals

The answer is letter A. the amount of ATP produced. ATP is produced in a long process in both glycolysis and Krebs cycle while the electron transport chain (ETC) is pathway for the electrons to be converted to ATP. There is a total of 38 ATP molecules in the cellular respiration- 2 from glycolysis, 2 from Krebs cycle, and 34 from the ETC.