Task: Text Categorization
Input (English): Question: ATP synthase: 
 Options:  <0> It generates ATP by a mechanism of rotational catalysis. <1> It is found in the membrane of the endoplasmic reticulum. <2> It synthesizes ATP when electrons flow through it. <3> It presents an electron channel. <4> Consume ATP by hydrolysis coupled to electron transport.
Output (English): biology