The compound that is an organic base containing chlorine and two phenolic rings, and is used increasingly for wound degerming, neonatal washes, hand scrubbing, and prepping surgical skin sites is ________.
A. a quaternary ammonium compound
B. triclosan
C. carbolic acid
D. formalin
E. chlorhexidine
Answer: E
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Why is the production of transgenic plants somewhat easier than the production of transgenic animals?
A. Plant cells are pluripotent. B. Plant cells are more stable than animal cells. C. Plant cells are totipotent. D. Plant cells are more highly evolved. E. Plant cells readily take up vectors, whereas animal cells do not.
. The more severe form of African sleeping sickness is called the
A. Gambian form. B. Rhodesian form. C. Guyanan form. D. Brazilian form
Overharvesting has primarily threatened which of the following?
a. aquatic species b. tropical forests c. subtropical deserts d. endemic species
What would be observed by live-cell fluorescence microscopy immediately after HIV entry if HIV is endocytosed first, and then later fuses with the endocytotic vesicle membrane?
A) A spot of red fluorescence will be visible on the infected cell's plasma membrane, marking the site of membrane fusion and HIV entry. B) The red fluorescent dye-labeled lipids will appear in the infected cell's interior. C) A spot of red fluorescence will diffuse in the infected cell's cytoplasm. D) A spot of red fluorescence will remain outside the cell after delivering the viral capsid.