1.The most thermostable plant virus is
(a) CMV (c) TMV
(b) TEV (d) TLCV
2. Longest plant virus is
(a) Citrus tristeza virus (c) Sugarcane mosaic virus
(b) Plum pox virus (d) Tobacco mosaic virus
3. Control of plant viruses by cross protection was observed for the first time by
(a) Mc Arthur (c) Mc Robert
(b) Mc Kiney (d) Mc Games
4.Compare the entry of plant and animal viruses. Why do they differ so greatly in
this regard? 5. How are plant viruses transmitted between hosts?
6. What are inclusion bodies? Where are they found?
7. Define the following symptoms:
(a) Enation (c) Bunchy top
(b) Shoe-string (d) Curly top
8. What are the similarities and differences between animal, plant and bacterial
viruses?
9. Define the following:
(a) Paramural bodies
(b) X- bodies
(c) Pinwheel inclusions
(d) Crystalline inclusions