11. Viroids were discovered by .....
12. Viroid consists of..........
13. Which of the following diseases is caused by viroid ?
14. The name virus was given by ________ .
15. Virus have ....
A. DNA core, Lipid coat
B. DNA or RNA core, Protein coat
C. DNA or RNA core, plasma membrane
D. DNA containing nucleus, lipid envelope
Answer : Option B
16. A virus contains ________ .
17. TMV virus was discovered by ________ .
18. The main structural component of virus is ________ .
A. nucleic acid
B. Protein
C. nucleic acid and protein
D. nucleic acid or protein
Answer : Option C
19. The first existing group of plant is ________ .
Match the following :
A B
(p) Chlamydomonas (i)Colonial Forms
(q) Volvox (ii)Unicellular
(r) Ulothrix (iii)Filamentous forms
(s) Nostoc (iv)Cyanophyceae
A. p - (i), q - (ii), r - (iii), s-(iv)
B. p - (ii), q - (iii), r - (i), s-(iv)
C. p - (iii), q - (i), r - (iv), s-(ii)
D. p - (ii), q - (i), r - (iii), s-(iv)
Answer : Option D