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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Fusarium oxysporum
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Fusarium venenatum
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Fusarium solani
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Fusarium sterilihyphosum
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Fusarium redolens
A
Correct answer
Explanation
Fusarium oxysporum is a fungal plant pathogen that causes Panama disease of bananas.
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Cochliobolus sativus
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Fusarium culmorum
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Fusarium graminearum
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Claviceps purpurea
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Tilletia controversa
C
Correct answer
Explanation
Fusarium graminearum is a plant pathogen which causes fusarium head blight, a devastating disease on wheat and barley.
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Puccinia asparagi
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Puccinia graminis
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Puccinia mariae-wilsoniae
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Puccinia poarum
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Puccinia striiformi
A
Correct answer
Explanation
Puccinia asparagi is the causative agent of asparagus rust. It is an autoecious fungus, meaning that all stages of its life cycle – pyciniospores, aeciospores and teliospores develop upon the same host plant.
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Sclerotinia sclerotiorum
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Magnaporthe grisea
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Verticillium albo-atrum
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T. basicola
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Puccinia sessilis
C
Correct answer
Explanation
It causes Verticillium Wilt or Maple Wilt. It attacks over 300 different cultivated plants and can persist as a saprotrophic soil organism for more than 15 years.
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Rust
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Anthracnose
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Pine pitch canker
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Mildew
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Armillaria root rot
C
Correct answer
Explanation
Pine trees are susceptible to pine pitch canker. Pine pitch canker first kills the tips of branches, then spreads down the entire length of branches, and ultimately it can kill the whole tree. Infected trees die because the fungus thrives inside the tree's vascular tissue and blocks its water supply. The fungus is spread through beetles that attack pine cones.
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Diphtheria
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Measles
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Chickenpox
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Tuberculosis
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Ringworm
E
Correct answer
Explanation
This is the correct option, as ringworm is cause by a fungi.
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Aspergillus
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Chlamydomonas
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Diatoms
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Seaweeds
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Plasmodium
A
Correct answer
Explanation
This is the correct option, as Aspergillus is a fungi.
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mushroom
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toadstool
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yeast
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puffball
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rhizobium
C
Correct answer
Explanation
This is the correct option. The fungi of yeast is very small in size, and can be only seen with the help of a microscope.
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Only a
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Only a and b
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Only b
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Only b and c
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Only c
E
Correct answer
Explanation
Diatoms is an example of mould fungi, is a false statement. Thus, it is the correct option. Diatoms is an example of an algae.
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Only P and Q
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Only P and R
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Only P and S
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Only Q and R
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Only R and S
A
Correct answer
Explanation
Yes, both are caused by fungus.
Ergot of Rye is a plant disease that is caused by the fungus Claviceps purpurea.
Powdery mildew of cucurbits is caused by two fungus: Sphaerotheca fuliginea and Erysiphe cichoracearum.
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calus
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thrush
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athletes foot
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elephantiasis
C
Correct answer
Explanation
Athlete's foot is a common fungal infection that typically affects the skin between the toes. It thrives in warm, moist environments.
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Malassezia furfur
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Candida
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Cryptococcus
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Aspergillus
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Mucor
D
Correct answer
Explanation
Patients with primary immunodeficiencies are susceptible to Aspergillus species infections, particularly when cell-mediated immunity is compromised.
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Rhizopus oryzae
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Saksenaea vasiformis
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Aspergillus fumigatus
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Beauveria bassiana
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Fusarium
D
Correct answer
Explanation
This fungi is usually as a saprophytic contaminant. World-wide, known as an insect parasite. Sympodial development of single-celled conidia on a narrow geniculate or zig-zag rachis emanating from a flask-shaped conidiophore.
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Absidia corymbifera
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Conidiobolus coronatus
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Cunninghamella bertholletiae
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Mucor
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Rhizomucor pusillus
A
Correct answer
Explanation
It is a common human pathogen causing pulmonary, rhinocerebral, disseminated, CNS zygomycosis. It is a small
pyriform shaped sporangia with a characteristic conical shaped columellae and pronounced apophysis.
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Candidiasis
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Chronic Candida onychomycosis
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Pityriasis folliculitis
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Paronychia
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Dermatophytosis
E
Correct answer
Explanation
Dermatophytosis of the scalp, glabrous skin, and nails is caused by dermatophytes which have the ability to utilise keratin as a nutrient source. No living tissue is invaded, the keratinised stratum corneum is simply colonised.