Task: Text Categorization
Input (English): Question: Acetyl-CoA: 
 Options:  <0> It is synthesized from pyruvate in the eukaryotic cytoplasm. <1> It has a phosphate bond rich in energy. <2> Presents a guanine nucleotide in coenzyme A. <3> Activates pyruvate carboxylase and inhibits pyruvate dehydrogenase. <4> It easily crosses the mitochondrial inner membrane.
Output (English): biology