Which one of the following describes a tRNA molecule that specifically recognizes the codon for the amino acid histidine, but is covalently bound (charged with) to the amino acid serine?
A. histinyl-tRNASer
B. histinyl-tRNAHis
C. seryl-tRNASer
D. seryl-tRNAHis
D
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The most definitive test to diagnose a helminth infection is
A. a good medical history of the patient, including recent foreign travel. B. an ova and parasite smear for microscopy. C. a serological test for the presence of anti-helminthic antibodies. D. a blood cell count to look for elevated levels of eosinophils.
A diminishing response by receptors to a
constant stimulus is a. perception. b. neural transduction. c. sensory adaptation. d. referred pain. e. characteristic of all receptors.
Which of the following is the best example of potential energy in a cell?
A. Cell division B. A molecule of glucose C. Movement of a flagellum D. Random molecular motion
Involves a small group of patients with a similar diagnosis
a. case report b. case series