A) naked RNA molecules only
B) naked DNA molecules only
C) naked DNA packed with viral genome
D) satellite RNA packed with viral genome
Correct Answer: A
Solution :
Viroids were first studied in potato spindle tuber disease. Viroids have no protein coat and contain circular RNA only. Molecule of RNA is 50 nm long and have mol wt 130,000. Complete nucleotide. sequence of viroids was worked out by Gross (1978).
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