All of the following are prion diseases EXCEPT
a. BSE.
b. Kuru.
c. Mad Cow Disease.
d. variant Creutzfeldt-Jacob disease.
e. all of these are prion diseases.
Answer: e
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Blood bypasses the fetal liver through the ____
a. umbilical arteries b. umbilical veins c. ductus venosus d. foramen ovale e. ductus arteriosus
George Beadle and Edward Tatum created a collection of mutants to study the following pathway
A mutant shows no growth on minimal media; however it shows growth if citrulline is provided. These results indicate the mutation would most likely be in the gene for: A. Enzyme I. B. Enzyme II. C. Enzyme III D. either Enzyme I or Enzyme II. E. either Enzyme II or Enzyme III.
In a plant, the exchange of gases with the environment involves
a. leaves. b. roots. c. stems. d. all of these
Sucrose is composed of
a. two molecules of fructose. b. two molecules of glucose. c. a molecule of fructose and a molecule of glucose. d. a molecule of fructose and a molecule of galactose. e. two molecules of glucose