Task: Question Answering
Input (English): Question: The phosphotransferase (PTS) system of many bacteria: 
 Options:  <1> It is commonly employed to incorporate medium sugars. <2> Participates in oxidative phosphorylation. <3> Participates in phosphorylation at the substrate level. <4> Consume directly ATP. <5> Dephosphorylates substrates as a step prior to transport.
Output (English): 1