Task: Text Categorization
Input (English): Question: A conjugated protein is: 
 Options:  <0> A protein that contains chemical components different from the permanently associated amino acids. <1> A protein that contains amino acids with side chains with conjugated bonds. <2> A protein that contains chemical components that make it insoluble. <3> A protein incorrectly folded. <4> A denatured and inactivated protein.
Output (English): chemistry