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: 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: Raile and Marriner in their studies on the theoretical works in nursing, review different aspects among which are those referred to semantics and structure. This analysis of the concrete theoretical framework refers to:
Options: <0> The simplicity <1> The generality <2> The empirical precision. <3> The deductible consequences. <4> The clarity.
nursery

Question: Williams-Beuren syndrome is characterized by a microdeletion of the long arm of the chromosome:
Options: <0> Four. <1> 22 <2> fifteen. <3> 17 <4> 7
biology