Two noncellular agents, smaller than viruses, are the infectious proteins called _____ and the infectious RNA strands called _____.

Two noncellular agents, smaller than viruses, are the infectious proteins called _____ and the infectious RNA strands called _____. 



A. Prions, capsomeres
B. Virions, prions
C. Viroids, phages
D. Prions, phages
E. Prions, viroids




Answer: E


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