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'.

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.
4

Question: A 30-year-old woman, previously healthy, presents a picture of right facial weakness in the course of about 20 hours, so she can not close her right eye and her mouth has been twisted. Refers to see double with the right lateral gaze. Which of the following diagnostic possibilities seems most likely? 
 Options:  <1> Bell's palsy <2> Ramsay-Hunt syndrome (herpetic facial paralysis). <3> Sarcoidosis <4> Left sylvian infarction with involvement of the rolandic operculum. <5> Protuberant involvement due to an outbreak of multiple sclerosis.
5

Question: The main stimulus for secretion of secretin is the presence in the duodenum of: 
 Options:  <1> acid pH <2> Carbohydrates <3> Proteins <4> Hypoosmolar chimo. <5> Hyosmolar chyme.

1