BRABU B.Sc. Semester-III (MJC-3) Mycology & Phytopathology
Top 100 VVI MCQs
Q1. Which of the following is the main reserve food material in fungi?
A. Starch
B. Glycogen and Oil
C. Cellulose
D. Sucrose
Answer: B. Glycogen and Oil
Q2. The cell wall of most fungi is mainly composed of:
A. Cellulose
B. Lignin
C. Chitin
D. Pectin
Answer: C. Chitin
Q3. Fungi are generally:
A. Autotrophic
B. Heterotrophic
C. Photosynthetic
D. Chemosynthetic
Answer: B. Heterotrophic
Q4. The body of a fungus is known as:
A. Sporophyte
B. Thallus
C. Rhizome
D. Protonema
Answer: B. Thallus
Q5. The thread-like structures of fungi are called:
A. Hyphae
B. Rhizoids
C. Stolons
D. Mycelia
Answer: A. Hyphae
Q6. A network of hyphae is called:
A. Thallus
B. Sporocarp
C. Mycelium
D. Conidium
Answer: C. Mycelium
Q7. Which type of nutrition is found in bread mould (Rhizopus)?
A. Parasitic
B. Saprophytic
C. Holozoic
D. Autotrophic
Answer: B. Saprophytic
Q8. Haustoria are mainly found in:
A. Saprophytic fungi
B. Parasitic fungi
C. Aquatic fungi
D. Symbiotic fungi
Answer: B. Parasitic fungi
Q9. Fragmentation is a type of:
A. Sexual reproduction
B. Vegetative reproduction
C. Seed reproduction
D. Pollination
Answer: B. Vegetative reproduction
Q10. Which one is an asexual spore of fungi?
A. Oospore
B. Zygospore
C. Conidium
D. Ascospore
Answer: C. Conidium
Q11. Sexual reproduction in fungi generally involves:
A. Plasmogamy, Karyogamy and Meiosis
B. Binary fission
C. Budding only
D. Fragmentation only
Answer: A. Plasmogamy, Karyogamy and Meiosis
Q12. The fusion of cytoplasm in fungi is called:
A. Karyogamy
B. Plasmogamy
C. Meiosis
D. Sporulation
Answer: B. Plasmogamy
Q13. Fusion of two nuclei in fungi is known as:
A. Cytokinesis
B. Plasmolysis
C. Karyogamy
D. Cleavage
Answer: C. Karyogamy
Q14. Meiosis in fungi mainly helps in:
A. Vegetative growth
B. Genetic variation
C. Nutrition
D. Cell wall formation
Answer: B. Genetic variation
Q15. Fungi reproduce mainly by:
A. Seeds
B. Spores
C. Flowers
D. Fruits
Answer: B. Spores
Q16. Which one is a sexual spore of Ascomycetes?
A. Conidium
B. Zoospore
C. Ascospore
D. Sporangiospore
Answer: C. Ascospore
Q17. Which one is a sexual spore of Basidiomycetes?
A. Basidiospore
B. Conidium
C. Zoospore
D. Oospore
Answer: A. Basidiospore
Q18. Synchytrium belongs to:
A. Ascomycetes
B. Basidiomycetes
C. Chytridiomycetes
D. Deuteromycetes
Answer: C. Chytridiomycetes
Q19. Synchytrium is mainly a:
A. Saprophyte
B. Parasite
C. Symbiont
D. Predator
Answer: B. Parasite
Q20. Synchytrium endobioticum causes:
A. White rust of crucifers
B. Potato wart disease
C. Red rot of sugarcane
D. Citrus canker
Answer: B. Potato wart disease
Q21. Albugo belongs to which class?
A. Chytridiomycetes
B. Oomycetes
C. Ascomycetes
D. Basidiomycetes
Answer: B. Oomycetes
Q22. Albugo candida causes:
A. Early blight
B. White rust of crucifers
C. Black stem rust
D. Citrus canker
Answer: B. White rust of crucifers
Q23. The asexual spores of Albugo are:
A. Basidiospores
B. Conidia
C. Sporangia
D. Ascospores
Answer: C. Sporangia
Q24. The sexual spores of Albugo are called:
A. Zoospores
B. Oospores
C. Conidia
D. Basidiospores
Answer: B. Oospores
Q25. Peziza belongs to:
A. Oomycetes
B. Basidiomycetes
C. Ascomycetes
D. Deuteromycetes
Answer: C. Ascomycetes
Q26. The fruiting body of Peziza is known as:
A. Basidiocarp
B. Ascocarp
C. Sporangium
D. Sorus
Answer: B. Ascocarp
Q27. The ascocarp of Peziza is:
A. Cleistothecium
B. Perithecium
C. Apothecium
D. Pycnidium
Answer: C. Apothecium
Q28. Ascospores are produced inside:
A. Basidium
B. Ascus
C. Conidiophore
D. Sporangium
Answer: B. Ascus
Q29. Puccinia belongs to:
A. Ascomycetes
B. Basidiomycetes
C. Oomycetes
D. Chytridiomycetes
Answer: B. Basidiomycetes
Q30. Puccinia graminis causes:
A. Red rot of sugarcane
B. Black stem rust of wheat
C. Late blight of potato
D. White rust of mustard
Answer: B. Black stem rust of wheat
Q31. Puccinia graminis is an example of:
A. Saprophytic fungus
B. Obligate parasite
C. Symbiotic fungus
D. Aquatic fungus
Answer: B. Obligate parasite
Q32. Puccinia graminis completes its life cycle on:
A. One host only
B. Two different hosts
C. Three hosts
D. Four hosts
Answer: B. Two different hosts
Q33. Puccinia graminis is a:
A. Monoecious fungus
B. Dioecious fungus
C. Heteroecious fungus
D. Homothallic fungus
Answer: C. Heteroecious fungus
Q34. Which spore is produced in the uredinial stage of Puccinia?
A. Basidiospore
B. Uredospore
C. Ascospore
D. Oospore
Answer: B. Uredospore
Q35. The resting spores of Puccinia are called:
A. Conidia
B. Zoospores
C. Teliospores
D. Ascospores
Answer: C. Teliospores
Q36. Alternaria belongs to:
A. Chytridiomycetes
B. Oomycetes
C. Deuteromycetes
D. Basidiomycetes
Answer: C. Deuteromycetes
Q37. Alternaria reproduces mainly by:
A. Ascospores
B. Basidiospores
C. Conidia
D. Oospores
Answer: C. Conidia
Q38. Which disease is commonly caused by Alternaria solani?
A. Early blight of potato
B. Citrus canker
C. Red rot of sugarcane
D. Little leaf of brinjal
Answer: A. Early blight of potato
Q39. The scientific study of plant diseases is called:
A. Mycology
B. Phytopathology
C. Bryology
D. Cytology
Answer: B. Phytopathology
Q40. The organism that causes a plant disease is known as:
A. Host
B. Vector
C. Pathogen
D. Inoculum
Answer: C. Pathogen
Q41. A plant suffering from a disease is called:
A. Pathogen
B. Host
C. Vector
D. Parasite
Answer: B. Host
Q42. The visible expression of a plant disease is known as:
A. Infection
B. Symptom
C. Inoculation
D. Incubation
Answer: B. Symptom
Q43. Chlorosis is characterized by:
A. Yellowing of leaves
B. Drying of roots
C. Blackening of stem
D. Cracking of fruits
Answer: A. Yellowing of leaves
Q44. Wilting in plants mainly occurs due to:
A. Loss of water balance
B. Excess chlorophyll
C. Increase in starch
D. Excess flowering
Answer: A. Loss of water balance
Q45. The complete sequence of events from infection to the production of new inoculum is called:
A. Plant succession
B. Disease cycle
C. Photosynthesis
D. Respiration
Answer: B. Disease cycle
Q46. The first step in the disease cycle is:
A. Sporulation
B. Infection
C. Dissemination of inoculum
D. Germination of seed
Answer: C. Dissemination of inoculum
Q47. Which of the following is an important method of plant disease control?
A. Crop rotation
B. Use of resistant varieties
C. Fungicides
D. All of the above
Answer: D. All of the above
Q48. Citrus canker is caused by:
A. Xanthomonas citri
B. Alternaria solani
C. Puccinia graminis
D. Albugo candida
Answer: A. Xanthomonas citri
Q49. Little leaf disease commonly affects:
A. Wheat
B. Potato
C. Brinjal
D. Mustard
Answer: C. Brinjal
Q50. Late blight of potato is caused by:
A. Alternaria solani
B. Phytophthora infestans
C. Puccinia graminis
D. Cercospora beticola
Answer: B. Phytophthora infestans
Q51. Early blight of potato is caused by:
A. Phytophthora infestans
B. Alternaria solani
C. Puccinia graminis
D. Albugo candida
Answer: B. Alternaria solani
Q52. Black stem rust of wheat is caused by:
A. Puccinia graminis
B. Ustilago maydis
C. Albugo candida
D. Rhizopus stolonifer
Answer: A. Puccinia graminis
Q53. White rust disease is caused by:
A. Puccinia graminis
B. Albugo candida
C. Alternaria solani
D. Phytophthora infestans
Answer: B. Albugo candida
Q54. Red rot is a serious disease of:
A. Wheat
B. Rice
C. Sugarcane
D. Mustard
Answer: C. Sugarcane
Q55. Red rot of sugarcane is caused by:
A. Colletotrichum falcatum
B. Puccinia graminis
C. Albugo candida
D. Phytophthora infestans
Answer: A. Colletotrichum falcatum
Q56. Lichens represent an association between:
A. Fungus and Alga
B. Fungus and Bacterium
C. Alga and Moss
D. Fungus and Fern
Answer: A. Fungus and Alga
Q57. The fungal partner of lichen is called:
A. Phycobiont
B. Mycobiont
C. Sporobiont
D. Cyanobiont
Answer: B. Mycobiont
Q58. The algal partner of lichen is known as:
A. Mycobiont
B. Phycobiont
C. Haustorium
D. Rhizoid
Answer: B. Phycobiont
Q59. Mycorrhiza is an association between:
A. Fungus and Root
B. Fungus and Stem
C. Fungus and Leaf
D. Fungus and Alga
Answer: A. Fungus and Root
Q60. Which of the following is a major benefit of mycorrhiza?
A. Increased absorption of water and minerals
B. Reduction in photosynthesis
C. Prevention of flowering
D. Decrease in root growth
Answer: A. Increased absorption of water and minerals
Q61. Which type of mycorrhiza forms a fungal sheath around the root?
A. Endomycorrhiza
B. Ectomycorrhiza
C. Orchid mycorrhiza
D. Ericoid mycorrhiza
Answer: B. Ectomycorrhiza
Q62. In endomycorrhiza, fungal hyphae penetrate into the:
A. Stem cortex
B. Root cortical cells
C. Leaf epidermis
D. Xylem vessels
Answer: B. Root cortical cells
Q63. Which of the following is a characteristic feature of fungi?
A. Presence of chlorophyll
B. Cell wall made of chitin
C. Production of seeds
D. Vascular tissues
Answer: B. Cell wall made of chitin
Q64. The vegetative body of most fungi is composed of:
A. Leaves and stem
B. Hyphae
C. Rhizoids only
D. Spores only
Answer: B. Hyphae
Q65. Septate hyphae are divided by:
A. Nodes
B. Septa
C. Rhizoids
D. Haustoria
Answer: B. Septa
Q66. Coenocytic hyphae are characterized by:
A. Many septa
B. Absence of septa
C. Presence of flowers
D. Presence of seeds
Answer: B. Absence of septa
Q67. Which fungal structure absorbs food from living host cells?
A. Conidium
B. Haustorium
C. Sporangium
D. Ascus
Answer: B. Haustorium
Q68. Zoospores are characterized by the presence of:
A. Wings
B. Flagella
C. Cilia
D. Capsule
Answer: B. Flagella
Q69. Which of the following spores is non-motile?
A. Zoospore
B. Conidium
C. Planospore
D. Biflagellate spore
Answer: B. Conidium
Q70. The scientific study of fungi is known as:
A. Bryology
B. Mycology
C. Phycology
D. Plant Pathology
Answer: B. Mycology
Q71. Which of the following is an example of a saprophytic fungus?
A. Rhizopus
B. Puccinia
C. Albugo
D. Synchytrium
Answer: A. Rhizopus
Q72. Which type of nutrition is found in lichens?
A. Saprophytic
B. Symbiotic
C. Holozoic
D. Parasitic
Answer: B. Symbiotic
Q73. Which disease is caused by a bacterial pathogen?
A. Citrus canker
B. White rust
C. Early blight
D. Black stem rust
Answer: A. Citrus canker
Q74. Which of the following is a fungal disease of potato?
A. Early blight
B. Late blight
C. Both A and B
D. Citrus canker
Answer: C. Both A and B
Q75. The disease cycle ends with the production of:
A. Roots
B. New inoculum
C. Flowers
D. Seeds
Answer: B. New inoculum
Q76. The spread of plant pathogens through air mainly occurs by:
A. Wind
B. Rocks
C. Soil particles only
D. Sunlight
Answer: A. Wind
Q77. Which method helps in preventing seed-borne diseases?
A. Seed treatment
B. Flood irrigation
C. Deep ploughing only
D. Excess fertilization
Answer: A. Seed treatment
Q78. The pathogen enters the host plant through natural openings or:
A. Flowers only
B. Wounds
C. Fruits only
D. Petals only
Answer: B. Wounds
Q79. Which of the following is NOT a fungal class included in the BRABU syllabus examples?
A. Oomycetes
B. Ascomycetes
C. Basidiomycetes
D. Anthocerotopsida
Answer: D. Anthocerotopsida
Q80. Which one of the following is the best example of a heteroecious fungus?
A. Peziza
B. Rhizopus
C. Puccinia graminis
D. Alternaria solani
Answer: C. Puccinia graminis
Q81. Which of the following diseases is caused by a phytoplasma?
A. Citrus canker
B. Little leaf of brinjal
C. Black stem rust
D. White rust
Answer: B. Little leaf of brinjal
Q82. The vector responsible for transmitting little leaf disease of brinjal is:
A. Aphid
B. Whitefly
C. Leafhopper (Jassid)
D. Thrips
Answer: C. Leafhopper (Jassid)
Q83. Which one is commonly known as the 'Irish Famine Disease'?
A. Early blight of potato
B. Late blight of potato
C. Red rot of sugarcane
D. White rust of mustard
Answer: B. Late blight of potato
Q84. The infective material capable of causing disease is called:
A. Symptom
B. Inoculum
C. Mycelium
D. Mycorrhiza
Answer: B. Inoculum
Q85. Which of the following is a fungal partner in lichen?
A. Mycobiont
B. Phycobiont
C. Cyanobiont
D. Rhizobiont
Answer: A. Mycobiont
Q86. Which fungal association improves phosphorus absorption in plants?
A. Lichen
B. Mycorrhiza
C. Haustorium
D. Sorus
Answer: B. Mycorrhiza
Q87. Which fungus produces ascospores?
A. Peziza
B. Puccinia
C. Albugo
D. Alternaria
Answer: A. Peziza
Q88. Which fungus produces basidiospores?
A. Synchytrium
B. Peziza
C. Puccinia
D. Albugo
Answer: C. Puccinia
Q89. Which of the following fungi reproduces mainly by conidia?
A. Alternaria
B. Puccinia
C. Albugo
D. Synchytrium
Answer: A. Alternaria
Q90. The study of fungi causing plant diseases is included under:
A. Mycology
B. Phytopathology
C. Ecology
D. Taxonomy
Answer: B. Phytopathology
Q91. Which one of the following fungi produces oospores?
A. Peziza
B. Puccinia
C. Albugo
D. Alternaria
Answer: C. Albugo
Q92. Which fungal disease is characterized by white pustules on leaves?
A. Early blight
B. White rust
C. Black stem rust
D. Red rot
Answer: B. White rust
Q93. Which disease affects the stem of wheat?
A. Citrus canker
B. Black stem rust
C. Little leaf
D. Late blight
Answer: B. Black stem rust
Q94. Which disease is characterized by reddish discoloration of the sugarcane stalk?
A. Red rot
B. White rust
C. Early blight
D. Citrus canker
Answer: A. Red rot
Q95. Which fungal structure is primarily responsible for vegetative growth?
A. Ascospore
B. Basidiospore
C. Mycelium
D. Oospore
Answer: C. Mycelium
Q96. Which fungal disease of potato is caused by an oomycete?
A. Early blight
B. Late blight
C. Black stem rust
D. White rust
Answer: B. Late blight
Q97. The reserve food material in fungi is mainly:
A. Starch
B. Cellulose
C. Glycogen
D. Inulin
Answer: C. Glycogen
Q98. Which one of the following is an example of a symbiotic association?
A. Puccinia on wheat
B. Albugo on mustard
C. Lichen
D. Alternaria on potato
Answer: C. Lichen
Q99. Which of the following diseases is caused by Phytophthora infestans?
A. Early blight of potato
B. Late blight of potato
C. White rust of mustard
D. Red rot of sugarcane
Answer: B. Late blight of potato
Q100. Which one of the following diseases is caused by Colletotrichum falcatum?
A. White rust of mustard
B. Black stem rust of wheat
C. Red rot of sugarcane
D. Late blight of potato
Answer: C. Red rot of sugarcane
BRABU B.Sc. 3rd Semester
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