Viral Diseases of Plants (B.Sc. Agriculture)
Comprehensive quiz covering plant virus classification, transmission vectors, symptoms, and cellular effects for agricultural students
Questions
Potato leaf roll virus occurs worldwide and affects only potato. It is a
- potyvirus
- potexvirus
- polerovirus
- curtovirus
Which of the following plant diseases is caused by a nanovirus?
- Papaya ring spot
- Citrus tristeza
- Banana bunchy top
- Plum pox
Which virus acts as helper virus for potato acuba mosaic virus transmission?
- Carrot red leaf virus
- PVA (potato virus A) or PVY (potato virus Y)
- Only PVY (potato virus Y)
- PVC (potato virus C)
According to the latest classification, wound tumour viruses are
- ssRNA virus
- dsRNA virus
- ssDNA virus
- dsDNA virus
Cytorhabdovirus causes infection of lettuce plant. Which of the following statements about Cytorhabdovirus is false?
- Lettuce necrotic yellow virus belongs to this genus.
- It is -ss RNA viral genus.
- Viruses are bullet-shaped.
- Viruses are non-enveloped.
Which of the following viruses is transmitted by thrips?
- Tomato pseudo curly top virus
- Tospovirus
- Maize mosaic virus
- Rice tungro virus
Which type of histological change can be seen in grapevine infected with grapevine fan leaf virus?
- Death of phloem cells
- Callosing of sieve plates
- Lignification of xylem elements
- Gall on leaves
Geminivirus causes bright yellow mosaic disease of plants. Which nuclear change does it bring in the course of infection?
- Breakdown of nucleolus
- Hypertrophy of nucleolus
- Vesiculation in the perinuclear space
- Reduction in chromatin production
Which of the following features is/are not observed in Tobacco Mosaic Virus (TMV)?
- +ss RNA
- Icosahedral symmetry
- Axile hole
- 95% protein+ 5% RNA
The grooves seen in infection with apple stem grooving virus are an example of
- hyperplasia
- hypoplasia
- atropy
- necrosis
With infection from which plant virus do multivesiculate bodies appear in the cytoplasm?
- Cucumber green mottle mosaic virus
- Henbane mosaic virus
- Tombusvirus
- Geminivirus
Genus curtovirus is associated with beet curly top disease. It is transmitted by
- leafhopper
- whitefly
- aphids
- planthoppers
Which of the following is the shape of turnip yellow mosaic virus?
- Rigid rod shape
- Flexous rod shape
- Bullet shape
- Icosahedral shape
Due to excessive fall out, shredded leaf or tattered leaf effect is created in prunus. Which virus can be accounted for this effect?
- Potyvirus
- Ilarvirus
- Nepovirus
- Closterovirus
On infection with virus, depositions of electron dense material between cell wall and plasma membrane may occur over substantial areas. What are these known as?
- Pinwheel inclusions
- X-bodies
- Crystalline inclusions
- Paramural bodies