MCQ
Which of the following is correct about viroids$?$
- AThey have free $DNA$ without protein coat.
- BThey have $RNA$ with protein coat.
- ✓They have free $RNA$ without protein coat.
- DThey have $DNA$ with protein coat.
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$\begin{array}{|p{0.3\linewidth}|p{0.5\linewidth}|} \hline Column\,\,-I & Column\,\,-II \\ \hline 1.\,\,Leptotene & p.\,\,Homologous\,\,chromosomes\,\,are\,\,separated \\ \hline 2.\,\,Diakinesis & q.\,\,Nucleolus\,\,reappear \\ \hline 3.\,\,Pachytene & r.\,\,Chromosome\,\,can\,\,observed\,\,in\,\,microscope \\ \hline 4.\,\,Anaphase\,\,-I & s.\,\,Nucleolus\,\,disappear \\ \hline & t.\,\,Crossing\,\,over \\ \hline \end{array}$
| Column I | Column II | ||
| A | Lymphatic System | (i) | Carries oxygenated blood |
| B | Pulmonary vein | (ii) | Immune Response |
| C | Thrombocytes | (iii) | To drain back the tissue fluid to the circulatory system |
| D | Lymphocytes | (iv) | Coagulation of blood |