CELLULAR RESPIRATION 



131 



During this part of the cycle there are no less than 30 molecules 

 of ATP synthesised. It is apparent, therefore, that the complete 

 oxidation of a single molecule of glucose leads to the production 



1 carbohydrate! - glucose 



[S.-A--P 

 IglycolysisI +© 



2 pyruvic 



other 

 pathways 



qlvcerol 



anaerobic 



-^lactic 



Fig. 38. 



Diagram to show the main features of the breakdown of foodstuffs 

 (based upon glucose) during aerobic respiration. 



The reactions where CO 2 is liberated are indicated. Reactions in 

 which substrates act as hydrogen donors to the cytochrome system 

 are also shown. These are the places where molecular oxygen is 

 utilised and energy captured in the form of energy-rich phosphate 

 (~P)asATP 



