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Infectious proteins are present in
A
Satellite viruses
B
Gemini viruses
C
Prions
D
Viroids
Detailed Solution
Prions are infectious agents made only of abnormally folded protein; they contain no nucleic acid.
They cause neurological diseases such as bovine spongiform encephalopathy (mad cow disease) in cattle, scrapie in sheep, and kuru and Creutzfeldt–Jakob disease (CJD) in humans.
Viroids are the opposite: free, infectious RNA of low molecular weight without any protein coat (e.g., potato spindle tuber disease).
Satellite viruses and gemini viruses contain nucleic acid along with protein.
Hence infectious proteins are present in prions.
They cause neurological diseases such as bovine spongiform encephalopathy (mad cow disease) in cattle, scrapie in sheep, and kuru and Creutzfeldt–Jakob disease (CJD) in humans.
Viroids are the opposite: free, infectious RNA of low molecular weight without any protein coat (e.g., potato spindle tuber disease).
Satellite viruses and gemini viruses contain nucleic acid along with protein.
Hence infectious proteins are present in prions.