The absence of this neurotransmitter would lead to a person having problems regulating body temperature and controlling their emotions.

A. serotonin
B. dopamine
C. endorphins
D. acetylcholinesterase


Answer: A

Biology & Microbiology

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Small RNA molecules that specifically down-regulate expression by binding to the appropriate mRNA molecule and inhibit translation are

A) mRNAs. B) siRNAs. C) tRNAs. D) rRNAs. E) miRNAs.

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A researcher uses genetic recombination techniques to remove a toxin gene from a pathogen, producing a(n) (attenuated/inactivated/subunit/toxoid) vaccine

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