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: The denaturing of proteins:
Options: <0> Alters the native conformation without affecting the biological activity. <1> It is always irreversible. <2> It can only be achieved by treatment with strong acids. <3> It does not affect the primary structure. <4> It produces the hydrolysis of the protein.
answer:
biology

question:
Question: The following patients are sent to the hypertension clinic. Indicate which one you would NOT suspect secondary hypertension.
Options: <0> 25 year old woman with an abdominal puff. <1> Hypertension with hypokalemia in a 50-year-old man who does not take drugs. <2> A 55-year-old woman with a body mass index of 28 and dyslipidemia. <3> A 78-year-old woman who has not been controlled with 3 drugs for 3 months. <4> Man of 60 years with daytime sleepiness, morning headache and snoring.
answer:
medicine

question:
Question: Usually the training of sperm occurs in:
Options: <0> The seminiferous tubules. <1> The epididymis <2> The male urethra. <3> The vagina <4> The uterus.
answer:
biology