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 arginosuccinasa:
Options: <0> In an enzyme of the citric acid cycle. <1> Converts arginine to lysine. <2> It is activated by the allosteric effector N-acetylglutamate. <3> It produces fumarate. <4> It is a glycogenic amino acid.
chemistry

Question: Which of the following molecules has at least a 90 angle ?:
Options: <0> H2O. <1> NH3. <2> CH4 <3> SF4. <4> BF3.
pharmacology

Question: What is the part of the antigen that is recognized by the antibody called ?:
Options: <0> Ectopic. <1> Epimer. <2> Epithet. <3> Epitope. <4> Endogenous.
chemistry