instruction:
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:
Question: Enzymatic regulation by reversible covalent modification: 
 Options:  <0> It involves the breaking of the peptide bond. <1> It requires the action of another enzyme. <2> It always involves phosphorylation reaction. <3> It never affects allosteric enzymes. <4> The enzyme never comes in two forms.
answer:
biology


question:
Question: Fibrinogen is activated by: 
 Options:  <0> Platelet stopper <1> Plasmina. <2> Thrombin <3> Thromboplastin. <4> Factor von Willebrand.
answer:
biology


question:
Question: Point out the INCORRECT response in relation to the Portfolio of Primary Care Services: 
 Options:  <0> It is the selection of services prioritized and organized in a specific way, which responds exclusively to health policy priorities. <1> The basic unit of the Portfolio of Services is a set of activities or action criteria that guide the attention to a problem or process of clinical or preventive health with specification of the population to which it is directed. <2> The general structure may have variants depending on the service in question or the different Autonomous Communities. <3> Its purpose is to promote the attention of the most frequent and relevant processes in PA in accordance with agreed scientific and technical criteria. <4> It reduces the avoidable clinical variability and facilitates equity in the provision of services.
answer:

nursery