Cytokines IL-1, IL-6 and TNF-? are ________, which induce higher body temperatures
a. endogenous pyogens
b. indigenous pyrogens
c. exogenous pyrogens
d. endogenous pyrogens
Answer: D
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Scientific work involves
a. the natural and supernatural world. b. retesting theories frequently for verification. c. proving theories with absolute certainty. d. testing hypotheses under every possible circumstance. e. coming up with the best descriptions of reality.
Vast numbers of microorganisms are being genetically characterized without culturing them in the laboratory today through ________.
A. metagenomic sequencing B. mass spectrometry and proteomics C. column chromatography D. polymerase chain reaction
If one strand of DNA has the base sequence AAG-CAA, the complementary strand has which of the following sequences?
A. TTC-GTG B. TTC-GTT C. UUC-GUU D. AAG-CAA E. UTC-GTU
Which of the following BEST defines diffusion?
a) net movement of particles from areas of high concentration to ears of low concentration b) net movement of particles from areas of low concentration to areas of high concentration c) net movement of particles between cells d) net movement of particles from a cell into the extracellular matrix e) net movement of fluids from the environment into and out of an organism