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

Biology & Microbiology

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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.

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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.

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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

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Involves a small group of patients with a similar diagnosis

a. case report b. case series

Biology & Microbiology