Task: Text Categorization
Input (English): Question: For which of the following steps of protein synthesis GTP (Guanosine triosphate) is needed: 
 Options:  <0> Activation of amino acids by aminioacyl-tRNA synthetases. <1> Union of ribosomes to the endoplasmic reticulum. <2> Translocation of nascent tRNA-protein complex from place A to place P. <3> Union of mRNA. <4> Union of signal recognition protein to ribosomes.
Output (English): chemistry