Viroid consists of....

Options :
  1. A single RNA molecule
  2. A single DNA molecule
  3. A single RNA molecule and a protein coat
  4. A single DNA molecule and a protein coat
Answer and Explanation :-

Answer: Option 1


Viroids consist of a short stretch (a few hundred nucleobases) of highly complementary, circular, single-stranded RNA. Viroid RNA does not code for any protein. The replication mechanism involves RNA polymerase II, an enzyme normally associated with synthesis of messenger RNA from DNA, which instead catalyzes "rolling circle" synthesis of new RNA using the viroid's RNA as template. Some viroids are ribozymes, having catalytic properties

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