Question

Match the lists and find the correct option.

(a) Viroid infecting tomato plant	(i) $6,500$ nucleotides
(b) $TMV$	(ii) $300-400$ nucleotides
(c) Polio virus	(iii) Two identical molecules of $RNA$
(d) Lentivirus	(iv) Many sided
	(v) Prion

• A. (a) - (ii), (b) - (i), (c) - (iv), (d) - (iii)
• B. (a) - (iii), (b) - (i), (c) - (iv), (d) - (ii)
• C. (a) - (ii), (b) - (iv), (c) - (v), (d) - (i)
• D. (a) - (i), (b) - (iv), (c) - (v), (d) - (i)

Answer 1

The correct option is A (a) - (ii), (b) - (i), (c) - (iv), (d) - (iii)

1) Viroid infecting tomato plant are the smallest plant they are composed of 240- 400 nucleotide and non-protein circular RNA.
2) TMV is rod- like structure and it is composed of 6,500 nucleotide. IT has single-stranded RNA.
3) Polio virus is polyhedral virus (such as adenovirus ), it is many sided. The capsid is icosahedron, 20 faces and 2o corners.
4) Lentivirus is the retrovirus subfamily. It can integrate foreign DNA into non-dividing cell and dividing cell.
Hence , correct option is 1.