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.

Q: Question: A potential receiver:
Options: <0> It is produced by the opening of voltage-dependent channels. <1> Increase its frequency if the intensity of the stimulus increases. <2> It occurs after the binding of the neurotransmitter to the postsynaptic receptor. <3> They occur if the trigger threshold is exceeded. <4> It can be exciter or inhibitor.

A: biology
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Q: Question: The translocation t (11; 14) is characteristic of mantle lymphoma. Which fusion protein originates, capable of promoting the cells towards the S phase of the cell cycle ?:
Options: <0> BCL-2 <1> Beta-2-microglobulin. <2> Cyclin D1. <3> Transreticulin. <4> ALK protein.

A: pharmacology
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Q: Question: The tetracyclines act on the:
Options: <0> DNA polymerase <1> Transpeptidation of the peptidoglycan in the wall. <2> RNA polymeres <3> 30S subunit of the ribosome. <4> DNA gyrase.

A:
biology
****