Biology
Microbes and Plant Diseases
1,145 Questions
Microbes and plant diseases examine the role of fungi, bacteria, and viruses in causing infections in plants and humans. Topics cover symbiotic associations like mycorrhiza, fungal structures, and specific agricultural pathogens. Practice these biology questions to master microbiology concepts for upcoming competitive examinations.
Fungal associationsPlant pathogensMicrobial structuresBacterial infections
Microbes and Plant Diseases Questions
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Claviceps
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Clavatia
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Penicillium
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Streptomyces
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Pythium
B
Correct answer
Explanation
The giant puff ball Clavatia contains an anti-cancer substance called calvacin. Eating of these fungus prevents stomach tumors.
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Downy mildew of crucifers : Peronospora parasitica
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Black rust of wheat : Puccinia graminis
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Loose smut of wheat : Ustilago tritici
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Early blight of potato : Phytophthora infestans
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Red rot of sugarcane : Colletotricum falcatum
D
Correct answer
Explanation
Early blight of potato is caused by Alternaria solani.
Late blight of potato is caused by Phytophthora infestans.
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Protostelium
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Labyrinthulomycota
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Plasmodiophorids
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Acrasids
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Fonticula
C
Correct answer
Explanation
Plasmodiophorids are the parasitic protists which belong to the super group Rhizaria.
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Gambierdiscus australes
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Gambierdiscus belizeanus
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Gambierdiscus pacificus
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Gambierdiscus toxicus
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Gloeokinium viscum
D
Correct answer
Explanation
Gambierdiscus toxicus is a species of dinoflagellates. It is the agent for ciguatera. It produces maitotoxin.
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Tinea nigra - Hortaea werneckii
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Tinea unguium - Trichophyton species
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Tinea pedis - Trichophyton species
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Tinea versicolor - Malassezia species
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Tinea cruris - Epidermophyton floccosum
A
Correct answer
Explanation
Hortaea werneckii causes tinea nigra. Its symptoms appear on the palms and soles as a black painless spot.
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Solanum stoloniferum
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Phytophthora infestans
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S. acaule
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S. vernei
C
Correct answer
Explanation
Solanum acaule is a wild potato species known to carry resistance genes against various potato viruses, including potato virus X.
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Dermitis
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Fowl pox
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Aspergillosis
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Fowl cholera
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None of these
C
Correct answer
Explanation
This is the correct option. Aspergillosis is a fungal disease of fowl. The symptoms include patches on skin due to the growth of moulds.
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pesticides
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fungi
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bacteria
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none of these
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Bacterium
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Virus
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Protozoan
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Fungus
D
Correct answer
Explanation
Fungus is responsible for rust disease in wheat.
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Aspergillus
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Yeast
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Rhizobium
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Paramecium
C
Correct answer
Explanation
Pea is a leguminous plant. Rhizobium is found in the root nodules of leguminous plants.
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Mycena asterina
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Aequorea victoria
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Armillaria
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Bolitaenidae
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Sea pens
A
Correct answer
Explanation
Mycena asterina is a species of agaric fungus. It grows singly or scattered on fallen leaves in Atlantic forests. The fruit bodies of the fungus are bioluminescent.
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Amanita ocreata
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Amanita subjunquillea
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Amanita verna
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Amanita virosiformis
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Amanita ovoidea
C
Correct answer
Explanation
This fungus is commonly known as the fool's mushroom. It is a deadly poisonous basidiomycete fungus.
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Brain-heart infusion agar
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Czapek’s agar
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Inhibitory mold agar
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Potato Dextrose Agar
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Potato flake agar
A
Correct answer
Explanation
It is a nonselective fungal culture medium that permits the growth of virtually all clinically relevant fungi. It is used for the primary recovery of saprophytic and dimorphic fungi.
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formation of round shaped sporangia.
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absence of spores in air.
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presence of large number of thread like branched hyphae.
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absence of moisture and nutrients.
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presence of moisture and nutrients.
E
Correct answer
Explanation
This is the correct option.
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Candida
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Aspergilla
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Cryptococcus
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Trichophyton
A
Correct answer
Explanation
Oropharyngeal thrush is a fungal infection of the mouth and throat caused by Candida species, most commonly Candida albicans.