When 2 antimicrobial agents aew used together and the total effect is less than their individual effects, this is called
A. additive effect
B. synergism
C. indifference
D. antagonism
Ans: D. antagonism
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All of the following are directly used as alternative substrates for glycolysis except
A) galactose. B) mannose. C) ribose. D) fructose. E) both choices A and C
The process by which cells acquire specialized forms and functions is called
A. cell differentiation. B. cell replication. C. cell growth. D. cell elasticity. E. None of the choices are correct.
In humans, the SRY gene has what function?
a) It produces a gene product that ultimately creates the typical male phenotype. b) It is responsible for allowing the X and Y chromosomes to pair during meiosis. c) It is responsible for X-inactivation in female mammals.d) It codes for testosterone receptors on a male's outer cell membranes.
Pathogenic bacteria isolated from the respiratory or intestinal tracts of humans are
A) strict aerobes that grow best in candle jars. B) capnophiles that grow best in carbon dioxide incubators. C) facultative anaerobes that require reducing media for growth. D) strict aerobes that grow best in reducing media. E) capnophiles that prefer highly oxygenated growth conditions.