In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.

Q: Question: In general, allosteric enzymes: 
 Options:  <1> They link the effectors in the active center. <2> They form covalent bonds with their negative effectors. <3> They originate hyperbolic curves of speed before the concentration of substrate. <4> They change their conformation when they link effectors. <5> They are irreversibly modified when they are inhibited.

A: 4
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Q: Question: A patient with Diabetes Mellitus type 1, which starts with high fever should: 
 Options:  <1> Assess the evolution of fever and wait. <2> Do not eat <3> Assess the need to increase insulin. <4> Drink plenty of water. <5> Do not administer insulin.

A: 3
****
Q: Question: The pH that provides a 0.01 M solution of benzoic acid (pKa = 4.2) is: 
 Options:  <1> 1.1. <2> 2.1. <3> 3.1. <4> 4.1. <5> 4.2.

A:
3
****