Charcot-Leyden crystals are often observed in specimens infected with which one of the following trematodes?
a. Clonorchis (Opisthorchis) sinensis
b. Opisthorchis viverrini
c. Fasciola hepatica
d. Paragonimus westermani
D
Paragonimus eggs may be recovered from sputum and occasionally in feces using a sedimentation concentration method. The eggs may be observed in a wet mount, with or without iodine stain . Charcot-Leyden crystals may also be observed in sputum or lung tissue specimens. Charcot-Leyden crystals are slender and pointed at both ends. The crystals normally appear colorless and stain purplish to red with trichrome.
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Which one of the following would be least likely to cross a lipid bilayer?
A. O2 B. CO2 C. ATP D. H2O E. N2
After a steroid hormone binds its receptor, the hormone-receptor complex then:a
activates a G protein. b. activates a protein kinase. c. activates adenylyl cyclase. d. activates calmodulin. e. binds DNA.
The majority of precipitation reaching land is derived from evaporation of oceanic waters
Indicate whether the statement is true or false
A newly described unicellular organism was isolated from a salt mine. This organism has no membranous organelles and its cell wall lacks peptidoglycan. Attempts to culture it in a medium with less than 25% salt were unsuccessful, but it was able to grow well on 25% salt supplemented agar. This organism would best be described as a ________ and is most likely in the domain ________.
A. halophile; Archaea. B. thermophile; Bacteria. C. halophile; Bacteria. D. thermophile; Archaea. E. thermophile; Eukarya.