Pseudomonas bacteria colonized the bile duct of a patient following his liver transplant surgery. This is an example of a
A) communicable disease.
B) latent infection.
C) nosocomial infection.
D) sporadic disease.
E) None of the answers is correct.
C
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Water levels are adjusted to meet the osmoregulatory needs of the organism in the _____ of the nephron under the control of _____, also called vasopressin
A. distal convoluted tubule; antidiuretic hormone B. loops of Henle; antidiuretic hormone C. collecting ducts; antidiuretic hormone D. distal convoluted tubule; diuretic hormone E. collecting ducts; diuretic hormone
Source habitats are areas where reproductive success is less than local mortality. Indicate whether the statement is true or false
One property that distinguishes cells in Domain Eukarya from those in Domain Bacteria is the presence of
A. a cell wall. B. DNA. C. flagella. D. membrane-bounded organelles.
What is the mechanism by which binding of testosterone to the testosterone receptor leads to upregulated gene transcription?
A. Binding of testosterone to the testosterone receptor leads to the activation of a G protein that stimulates the activation of enzymes that promote gene transcription. B. Binding of testosterone to the testosterone receptor leads to the opening of an ion channel that leads to an increase in calcium in the cytoplasm. The increased calcium levels activate calmodulin, which can go on to activate other proteins that promote gene transcription. C. Binding of testosterone to the testosterone receptor leads to the increase in second messengers that activate a kinase cascade, ultimately leading to the activation of transcription factors that promote gene transcription. D. Binding of testosterone to the testosterone receptor activates guanylyl cyclase, and the resulting cGMP promotes gene transcription. E. Binding of testosterone to the testosterone receptor leads to a conformational change that allows the receptor to enter the nucleus where it can bind to DNA and promote gene transcription.