What substances in the body are most closely associated with a drug's influence on the nervous system?

A) endorphins
B) sodium and potassium ions
C) neurotransmitters
D) proteins


C

Biology & Microbiology

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________ is used to control transcription of some anabolic pathways involved in amino acid biosynthesis.

A. Induction B. Attenuation C. Catabolite repression D. All of the choices are correct.

Biology & Microbiology

____ is when one organism successfully outcompetes another organism and excludes it from a particular area or niche

a. Predation b. Resource partitioning c. Parasitism d. Competitive exclusion e. Commensalism

Biology & Microbiology

The large-scale community of organisms in a major ecological setting is a(n) ____

a. environmental system b. habitat c. biome d. ecosystem e. niche

Biology & Microbiology

Which of the following consists of a protein coat surrounding a molecule of genetic material?

A) Protists B) Viruses C) Bacteria D) Archaea E) Prions

Biology & Microbiology