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.

Question: In a potentiometry at zero intensity the electrode: 
 Options:  <0> Indicator always measures balance potentials. <1> Indicator measures the half-wave potential. <2> Indicator can measure a mixed potential. <3> Reference is always a calomel platinum electrode. <4> Indicator is always a platinum electrode.
chemistry

Question: The proteasome: 
 Options:  <0> It is formed by 21 homologous subunits organized in 3 rings. <1> It is a protein complex that catalyzes the hydrolysis of ubiquitinated proteins. <2> It is found only in animal eukaryotic cells. <3> Digest acylated proteins. <4> It is activated by a drug, bertezomil, in therapy for multiple myeloma.
chemistry

Question: The reaction of Wolff-Kishner is one: 
 Options:  <0> Oxidation of carbonyls to give acids. <1> Reduction of carbonyls to alcohols. <2> Deoxygenation of carbonyls that takes place in an acid medium. <3> Deoxygenation of carbonyls that is carried out in an alkaline medium. <4> Carbonyl deoxygenation performed in neutral medium.

chemistry