Phencyclidine (PCP) acts on receptors that normally respond to the neurotransmitter:

A) acetylcholine
B) dopamine
C) glutamate
D) serotonin


Answer: C) glutamate

Biology & Microbiology

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A nucleotide is constituted of

a. a five carbon sugar, a nitrogenous acid, and a phosphate group. b. a six carbon sugar, a nitrogenous base, and a phosphate group. c. a five carbon sugar, a nitrogenous base, and a phosphate group. d. a six carbon sugar, a nitrogenous acid, and a phosphate group. e. a four carbon sugar, a nitrogenous acid, and a phosphate group

Biology & Microbiology

Explain why “acid-fast” organisms are not usually visible when Gram stained. In other words, what biological property makes them resistant to Gram staining?

What will be an ideal response?

Biology & Microbiology

Which of the following pairs of structure are homologous?

A. wing of a dragonfly and wing of a hawk. B. wing of a dragonfly and forelimb of a flying squirrel. C. pectoral fin of a shark and front flipper of porpoise. D. forelimb of a dog and forelimb of a horse. E. wing of a bluejay and front flipper of a porpoise.

Biology & Microbiology

Gene regulation can involve a protein repressor that blocks _____ from initiating transcription.

A) DNA polymerase III B) RNA polymerase C) DNA polymerase I D) rRNA E) mRNA

Biology & Microbiology