Why is insulin produced by genetically engineered E. coli cells superior to insulin obtained from
animal sources?
a. Animal insulin has a shorter life span than insulin produced using recombinant DNA
techniques.
b. It contains human rather than animal sequences, reducing the chances of an allergic
response.
c. Animal insulin is more difficult to purify than is recombinantly produced insulin.
d. Recombinantly produced insulin has a much higher activity level.
e. Recombinantly produced insulin is easier to obtain than insulin from animals.
B
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Industrial melanism is a term
A. describing the color change induced by living in industrialized areas. B. explaining that the darker moths have higher mutation rates because of industrialization. C. describing the evolutionary process in which initially light-colored organisms become dark as a result of natural selection. D. explaining that the darker moths having higher reproductive success because of their pigmentation. E. describing the widespread implementation of pollution controls.
The salinity of the world's oceans is increasing as more salts dissolve in the water
Indicate whether the statement is true or false
Studies, such as clinical trials, that are completely randomized so that neither the physicians nor the patients know who is receiving an experimental drug are called ________
A) placebo studies B) homeopathic medicine C) regenerative medicine D) double-blind trials E) None of these choices
Marion is going to the hospital for a triple bypass operation. She will have general anesthesia, intravenous catheter, surgical wounds, and a urinary catheter. Which health-care-associated infection is she at greatest risk for contracting?
A. surgical site B. urinary tract C. meningitis D. respiratory E. septicemia