In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.
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Question: Question: The aminoacyl-tRNA synthetases: 
 Options:  <0> They participate in the synthesis of the TRANs. <1> They participate in the maturation of the precursors of the TRANs. <2> They are responsible for the synthesis of amino acids. <3> They are responsible for the interpretation of the genetic code. <4> They synthesize parts of the ribosomes.

Answer: chemistry


Question: Question: A spontaneous process is characterized because: 
 Options:  <0> In isolated systems the entropy decreases (ΔS <0). <1> At constant pressure and temperature, the Gibbs energy decreases (ΔG <0). <2> At constant pressure and temperature, the Helmholtz energy decreases (ΔA <0). <3> At constant volume and temperature, the Gibbs energy increases (ΔG> 0). <4> It is reversible.

Answer: pharmacology


Question: Question: In the reaction of methoxybenzene with acetic anhydride and aluminum trichloride followed by treatment with an aqueous solution of hydrochloric acid is formed mainly: 
 Options:  <0> 4-methoxybenzoic acid. <1> 1- (4-methoxyphenyl) ethanone. <2> 1- (3-methoxyphenyl) ethanone. <3> 3-methoxybenzoic acid. <4> 4-methoxyphenyl acetate.

Answer:
chemistry