Biological Classification Question 112
112. Which of the following is correct about viroids?
(a) They have free RNA without protein coat
(b) They have DNA with protein coat
(c) They have free DNA without protein coat
(d) They have RNA with protein coat
Show Answer
Answer : a
Hints & Solutions
(a) Viroids have free RNA without protein coat. Viroid, an infectious particle smaller than any of the known viruses, an agent of certain plant diseases. The particle consists only of an extremely small circular RNA (ribonucleic acid) molecule, lacking the protein coat of a virus. Dr. Theodor o. Diener, discovered viroids and also to distinguish it from a virus.
