How do normal prion proteins (PrP) differ from the infectious prion proteins?
a. Normal PrP have alpha-helices; infectious PrP have beta-pleated sheets.
b. Normal PrP are found in all mammals; infectious PrP are found in only cows.
c. Normal PrP lack nucleic acid; infectious PrP have nucleic acid.
d. Normal PrP are found on mammals; infectious PrP are found on reptiles.
Ans: a. Normal PrP have alpha-helices; infectious PrP have beta-pleated sheets.
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