1. What is the general nature of a virus?
A) Multicellular parasite
B) Submicroscopic, transmissible, intercellular, obligate parasite
C) Cellular organism
D) Non-parasitic microorganism
Answer: B) Submicroscopic, transmissible, intercellular, obligate parasite
2. What is the typical size range of viruses?
A) Greater than 200 millimicron
B) Less than 200 millimicron
C) 200-500 millimicron
D) 1-2 microns
Answer: B) Less than 200 millimicron
3. What component surrounds the nucleic acid in a virus?
A) Lipid membrane
B) Protein coat (capsid)
C) Carbohydrate shell
D) Fatty acid layer
Answer: B) Protein coat (capsid)
4. Which of the following is an example of a rigid rod-shaped plant virus?
A) Potato Virus X (PVX)
B) Tobacco Mosaic Virus (TMV)
C) Cucumber Mosaic Virus (CMV)
D) Rice Tungro Spherical Virus (RTSV)
Answer: B) Tobacco Mosaic Virus (TMV)
5. What type of nucleic acid do most plant viruses contain?
A) DNA
B) RNA
C) Both RNA and DNA
D) None of the above
Answer: B) RNA
6. Which of the following plant viruses has a DNA genome?
A) Rice Tungro Bacilliform Virus (RTBV)
B) Tobacco Mosaic Virus (TMV)
C) Cucumber Mosaic Virus (CMV)
D) Potato Virus X (PVX)
Answer: A) Rice Tungro Bacilliform Virus (RTBV)
7. What shape do filamentous rod viruses typically have?
A) Spherical
B) Bacilliform
C) Elongated
D) Flexuous
Answer: C) Elongated
8. Which of the following viruses is a geminivirus?
A) Maize streak virus
B) Tomato Spotted Wilt Virus
C) Potato Virus X
D) Cucumber Mosaic Virus
Answer: A) Maize streak virus
9. What is the transmission route for Cucumber Mosaic Virus (CMV)?
A) Seeds
B) Sap
C) Vegetative propagation
D) Pollen
Answer: B) Sap
10. Which of the following is a characteristic of viruses?
A) They have cellular structure
B) They can grow in artificial media
C) They can reproduce only inside a host cell
D) They are visible under a light microscope
Answer: C) They can reproduce only inside a host cell
11. What is the vector for the transmission of Cucumber Mosaic Virus (CMV)?
A) Nematodes
B) Aphids
C) Fungi
D) Mites
Answer: B) Aphids
12. What is a common symptom of viral infections in plants?
A) Root rot
B) Necrosis
C) Chlorosis
D) Wilt
Answer: C) Chlorosis
13. Which of the following viruses is transmitted by sap and farm equipment?
A) Rice Tungro Virus
B) Tobacco Mosaic Virus (TMV)
C) Potato Virus X
D) Bean Golden Mosaic Virus
Answer: B) Tobacco Mosaic Virus (TMV)
14. Which of the following viruses is associated with Banana Bunchy Top?
A) Tomato Spotted Wilt Virus
B) Cucumber Mosaic Virus
C) Indian Cassava Mosaic Virus
D) Banana Bunchy Top Virus
Answer: D) Banana Bunchy Top Virus
15. What is the transmission method for Bean Common Mosaic Virus (BCMV)?
A) Pollen
B) Vegetative propagation
C) Seeds
D) Insect vectors
Answer: C) Seeds
16. What is the shape of the nucleic acid in Bacilliform viruses?
A) Circular
B) Linear
C) Spiral
D) Isometric
Answer: B) Linear
17. Which virus is associated with Tomato Spotted Wilt Virus (TSWV)?
A) Bacilliform virus
B) Flexuous rod virus
C) Isometric virus
D) Filamentous rod virus
Answer: C) Isometric virus
18. What is the characteristic of the protein subunits in viruses?
A) They are made up of nucleic acids
B) They form the viral coat and provide serological differentiation
C) They help in photosynthesis
D) They replicate viral RNA
Answer: B) They form the viral coat and provide serological differentiation
19. What is the term used to describe the inability of viruses to perform enzymatic activities?
A) Non-living properties
B) Genetic mutation
C) Reproduction
D) Cellular structure
Answer: A) Non-living properties
20. Which virus is an example of a plant virus with a single-stranded RNA genome?
A) Tomato Spotted Wilt Virus
B) Rice Tungro Bacilliform Virus
C) Cucumber Mosaic Virus
D) Bean Golden Mosaic Virus
Answer: C) Cucumber Mosaic Virus
21. What is the name of the virus that causes mosaic symptoms in tobacco?
A) Tobacco Rattle Virus
B) Tomato Spotted Wilt Virus
C) Tobacco Mosaic Virus
D) Potato Virus X
Answer: C) Tobacco Mosaic Virus
22. What type of virus is associated with Rice Grassy Stunt?
A) Bacilliform virus
B) Flexuous rod virus
C) Filamentous rod virus
D) Spherical virus
Answer: C) Filamentous rod virus
23. Which of the following viruses is transmitted by aphids?
A) Rice Tungro Bacilliform Virus
B) Tobacco Mosaic Virus
C) Prunus Necrotic Ringspot Virus
D) Tomato Spotted Wilt Virus
Answer: B) Tobacco Mosaic Virus
24. What is the first step in the multiplication of a virus inside a host cell?
A) Formation of the protein coat
B) Separation of nucleic acid from the protein coat
C) Replication of nucleic acids
D) Release of the virus particles
Answer: B) Separation of nucleic acid from the protein coat
25. What does the term “split genome” refer to in plant viruses?
A) A virus with a single nucleic acid strand
B) A virus with multiple pieces of nucleic acid in different particles
C) A virus with no protein coat
D) A virus with a double-stranded genome
Answer: B) A virus with multiple pieces of nucleic acid in different particles
26. Which virus is known to cause Banana Bunchy Top disease?
A) Banana Streak Virus
B) Indian Cassava Mosaic Virus
C) Tomato Spotted Wilt Virus
D) Cucumber Mosaic Virus
Answer: A) Banana Streak Virus
27. What is the structure of the virus that provides protection to the nucleic acid?
A) Cell wall
B) Protein coat (capsid)
C) Lipid membrane
D) Plasmid
Answer: B) Protein coat (capsid)
28. Which of the following symptoms is commonly associated with viral infections in plants?
A) Yellowing and stunting
B) Wilting and root rot
C) Leaf curling and necrosis
D) Leaf spot and blight
Answer: C) Leaf curling and necrosis
29. What is the function of viral proteins in plant viruses?
A) To form the virus particle and enable its transmission
B) To replicate the viral nucleic acid
C) To disrupt host cell functions
D) To store energy for the virus
Answer: A) To form the virus particle and enable its transmission
30. What type of viruses are transmitted through sap, farm equipment, and by contact?
A) Bacilliform viruses
B) Flexuous rod viruses
C) Filamentous rod viruses
D) Rod-shaped ss RNA viruses
Answer: D) Rod-shaped ss RNA viruses
31. What is the main symptom of Cowpea aphid-borne mosaic virus (CAMV) on cowpea?
A) Leaf necrosis
B) Chlorosis with dark and light green patches
C) Stunted growth
D) White streaking on leaves
Answer: B) Chlorosis with dark and light green patches
32. Which insect is a vector for Cowpea aphid-borne mosaic virus (CAMV)?
A) Whitefly
B) Aphids
C) Leafhopper
D) Thrips
Answer: B) Aphids
33. What is the primary vector for Cassava mosaic virus on cassava?
A) Aphids
B) Leafhopper
C) Whitefly
D) Thrips
Answer: C) Whitefly
34. What is the main symptom of Cassava mosaic virus on cassava?
A) Yellow streaks on leaves
B) Mosaic mottling and leaf distortion
C) Wilting of roots
D) Red spots on tubers
Answer: B) Mosaic mottling and leaf distortion
35. Which virus causes yellow mosaic disease in greengram and blackgram?
A) Tomato Spotted Wilt Virus (TSWV)
B) Mungbean Yellow Mosaic Virus (MYMV)
C) Cucumber Mosaic Virus (CMV)
D) Rice Tungro Virus
Answer: B) Mungbean Yellow Mosaic Virus (MYMV)
36. What is the vector for Mungbean Yellow Mosaic Virus (MYMV)?
A) Leafhopper
B) Whitefly
C) Aphids
D) Thrips
Answer: B) Whitefly
37. What is the primary symptom of Sterility Mosaic Disease in pigeonpea?
A) Stunted plant growth with no flower or pod formation
B) Dark green streaks on leaves
C) Reduction in leaf size
D) Necrosis of roots
Answer: A) Stunted plant growth with no flower or pod formation
38. Which insect is the vector for Pigeonpea Sterility Mosaic Virus?
A) Whitefly
B) Eriophyid mite
C) Aphids
D) Thrips
Answer: B) Eriophyid mite
39. Which virus causes barley stripe mosaic in barley?
A) Barley Yellow Dwarf Virus
B) Barley Stripe Mosaic Virus
C) Maize Streak Virus
D) Cucumber Mosaic Virus
Answer: B) Barley Stripe Mosaic Virus
40. What is the main symptom of Barley Stripe Mosaic Virus?
A) Yellowing of stems
B) Light green stripes on leaves
C) Brown streaks on leaves
D) Leaf curling
Answer: B) Light green stripes on leaves
41. Which virus causes maize streak in maize?
A) Maize Streak Virus
B) Tobacco Mosaic Virus
C) Cucumber Mosaic Virus
D) Tomato Spotted Wilt Virus
Answer: A) Maize Streak Virus
42. What is the vector for Maize Streak Virus?
A) Whitefly
B) Aphids
C) Leafhopper
D) Thrips
Answer: C) Leafhopper
43. Which type of virus causes vein clearing in Bhendi (okra)?
A) ssDNA geminate particles
B) dsRNA viruses
C) ssRNA virus
D) ssDNA bipartite genome
Answer: A) ssDNA geminate particles
44. What is the vector for Bhendi Yellow Vein Mosaic Virus (BYVMV)?
A) Aphids
B) Whitefly
C) Thrips
D) Leafhopper
Answer: B) Whitefly
45. What is the main symptom of Potato Vein Banding Virus?
A) Veins remain green while interveinal areas become yellow
B) Leaf curling and crinkling
C) Small yellow spots on leaves
D) Necrosis of plant tissues
Answer: A) Veins remain green while interveinal areas become yellow
46. Which insect vector is associated with Potato Vein Banding Virus?
A) Whitefly
B) Leafhopper
C) Aphids
D) Thrips
Answer: C) Aphids
47. What is the characteristic symptom of Leaf Crinkle in blackgram?
A) Crinkling and curling of leaves
B) Stunting and bushy plants
C) Yellowing of leaves
D) Wilting of plant roots
Answer: A) Crinkling and curling of leaves
48. Which virus causes leaf crinkle in blackgram?
A) Tomato Spotted Wilt Virus
B) Urdbean Leaf Crinkle Virus (ULCV)
C) Cucumber Mosaic Virus
D) Rice Tungro Bacilliform Virus
Answer: B) Urdbean Leaf Crinkle Virus (ULCV)
49. What type of virus causes Leaf Crinkle in blackgram?
A) ssDNA geminate particles
B) ssRNA virus
C) Isometric virus
D) Filamentous ssRNA
Answer: A) ssDNA geminate particles
50. What is the vector for Tomato and Tobacco Leaf Curl Virus (TLCV)?
A) Aphids
B) Whitefly
C) Leafhopper
D) Thrips
Answer: B) Whitefly
51. What is the main symptom of Tomato and Tobacco Leaf Curl Virus (TLCV)?
A) Leaf curling, twisting, and puckering
B) Yellow spots on leaves
C) Reduced fruit size
D) Necrosis of leaves
Answer: A) Leaf curling, twisting, and puckering
52. Which virus is associated with Blackgram Leaf Curl?
A) Tomato Spotted Wilt Virus (TSWV)
B) Tobacco Leaf Curl Virus
C) Tomato Spotted Wilt Virus (TSWV)
D) Maize Streak Virus
Answer: A) Tomato Spotted Wilt Virus (TSWV)
53. What is the vector for Tomato Spotted Wilt Virus (TSWV) in Blackgram?
A) Whitefly
B) Aphids
C) Thrips
D) Leafhopper
Answer: C) Thrips
54. What is the symptom of Enation caused by Tomato Leaf Curl Virus (TLCV)?
A) Yellowing of interveinal areas
B) Leafy outgrowths from veins on the under surface of leaves
C) Leaf rolling from edges
D) Necrosis of root tips
Answer: B) Leafy outgrowths from veins on the under surface of leaves
55. What is the shape of Tomato Leaf Curl Virus (TLCV)?
A) Isometric
B) Filamentous
C) Spherical
D) Bacilliform
Answer: A) Isometric
56. What is the virus responsible for Bud Necrosis in groundnut?
A) Tomato Spotted Wilt Virus (TSWV)
B) Cucumber Mosaic Virus
C) Maize Streak Virus
D) Tobacco Mosaic Virus
Answer: A) Tomato Spotted Wilt Virus (TSWV)
57. What is the vector for Bud Necrosis of groundnut?
A) Leafhopper
B) Aphids
C) Thrips
D) Whitefly
Answer: C) Thrips
58. What is the characteristic symptom of Dwarfing in plants?
A) Leaves turn yellow
B) Reduced overall size of the plant without changing the proportions
C) Wilting of roots
D) Excessive flowering
Answer: B) Reduced overall size of the plant without changing the proportions
59. What is the vector for Dwarfing caused by viral infection?
A) Whitefly
B) Aphids
C) Leafhopper
D) Thrips
Answer: C) Leafhopper
60. What is the main symptom of Yellow Vein Mosaic in Bhendi (okra)?
A) Yellow streaks along the leaf margins
B) Stunting of the plant
C) Mottling of leaves with yellow patches
D) Root necrosis
Answer: C) Mottling of leaves with yellow patches
