Serotonin is produced from the amino acid tryptophan.

a. true
b. false


Answer: a. true

Biology & Microbiology

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Picea glauca is a seed-bearing plant. What other characteristic MUST be true of this species?

A. It produces flowers. B. It produces fruits. C. The gametophyte is the dominant generation. D. It has vascular tissue. E. Double-fertilization results in the production of endosperm.

Biology & Microbiology

Which hormone shuts down HCl secretion?

a. gastrin b. somatostatin c. leptin d. ghrelin e. secretin

Biology & Microbiology

Which is the predominant second messenger involved in regulating glucose metabolism?

a. insulin b. glucagon c. adenyl cyclase d. cyclic AMP e. G protein

Biology & Microbiology

Robert Koch was involved in research on all of the following topics EXCEPT

A. the cause of anthrax. B. the cause of fermentation. C. development of a method to determine the cause of an infectious disease. D. the cause of tuberculosis. E. techniques for isolating microbes in the laboratory.

Biology & Microbiology