Task: Text Categorization
Input (English): Question: The speed of the electron transport chain: 
 Options:  <0> It depends on the concentration of oxygen. <1> Increases when the concentration of ATP increases. <2> It is determined by the need for ATP. <3> It is independent of ADP phosphorylation. <4> It increases when the concentration of NADH and FADH2 rises. 6
Output (English): chemistry