A woman with which of the following human conditions would exhibit normal physical features?
a. triple-X syndrome
b. Turner syndrome
c. Down syndrome
d. cri-du-chat
Ans: a. triple-X syndrome
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Bioassays can be used to
(a) test new drugs. (b) determine the effectiveness of new fertilizers and herbicides. (c) measure the effects their waste discharges have on aquatic organisms. (d) do all of these choice
All forms of diabetes mellitus involve defects in the production or function of insulin. The result of this defect in insulin is ________
A) a lack of glucose in the bloodstream B) a lack of sodium in the bloodstream C) a buildup of glucose in the bloodstream D) a buildup of sodium in the bloodstream
In a patient with bacteremia, you would expect to find __________.
A) viruses in the blood B) bacteria in the blood C) bacterial toxins in the blood D) an increase in bacteria in the blood and localized areas over time E) bacteria in a localized area, such as an abscess
A stomach cell is producing pepsin, an enzyme that hydrolyzes proteins. Which of the following events suggests that gene expression of pepsin has been turned off in the cell?
A) The pepsin protein is folded properly in the cytoplasm. B) The chromosome with the pepsin gene is tightly coiled. C) The pepsin mRNA leaves the nucleus and enters the cytoplasm. D) Activators and RNA polymerases are abundant in the nucleus.