Plant Pathology Fungi, Classification and Symptoms of diseases
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Question No. 1
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A disease constantly present in moderate to severe form in a specific area is classified as:
A.
Sporadic
B.
Epidemic
C.
Endemic
D.
Pandemic
Question No. 2
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Red rot of sugarcane is an example of which type of disease occurrence?
A.
Endemic
B.
Sporadic
C.
Pandemic
D.
Epidemic
Question No. 3
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Green ear disease of Bajra is an example of which type of disease occurrence?
A.
Pandemic
B.
Endemic
C.
Sporadic
D.
Epidemic
Question No. 4
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A disease prevalent throughout the country or the world is known as:
A.
Endemic
B.
Sporadic
C.
Pandemic
D.
Epidemic
Question No. 5
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Which symptom is characterized by a cottony or downy layer on the leaf surface?
A.
Powdery mildew
B.
Rust
C.
Downy mildew
D.
Anthracnose
Question No. 6
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Which symptom is characterized by a dusty or powdery appearance, often on the upper surface of plants?
A.
Rust
B.
Downy mildew
C.
Anthracnose
D.
Powdery mildew
Question No. 7
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Which symptom is characterized by small pustules of spores, often with a rusty appearance?
A.
Powdery mildew
B.
Downy mildew
C.
Anthracnose
D.
Rust
Question No. 8
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Linseed rust is an example of which type of rust?
A.
Heteroecious
B.
Autoecious
C.
Sporadic
D.
Pandemic
Question No. 9
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Wheat rust is an example of which type of rust?
A.
Autoecious
B.
Endemic
C.
Heteroecious
D.
Sporadic
Question No. 10
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Which symptom is characterized by ulcer-like lesions, often on stems and pods?
A.
Smut
B.
Anthracnose
C.
Scab
D.
Canker
Question No. 11
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Which symptom is characterized by a sooty or charcoal-like powder, often in the ovary of floral organs?
A.
Rust
B.
Smut
C.
Scab
D.
Downy mildew
Question No. 12
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White blisters on crucifers, breaking open to expose a white powdery mass, are characteristic of:
A.
White rust
B.
Powdery mildew
C.
Downy mildew
D.
Rust
Question No. 13
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Which symptom refers to a roughened or crust-like lesion, or a freckled appearance?
A.
Smut
B.
Scab
C.
Canker
D.
Anthracnose
Question No. 14
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A compact, often hard, mass of dormant fungus mycelium is known as:
A.
Sclerotia
B.
Sporangia
C.
Hyphae
D.
Conidia
Question No. 15
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The transformation of floral parts into green leafy structures is known as:
A.
Etiolation
B.
Phyllody
C.
Hypertrophy
D.
Hyperplasia
Question No. 16
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Loss of green color due to prolonged exposure to darkness is called:
A.
Chlorosis
B.
Necrosis
C.
Etiolation
D.
Wilt
Question No. 17
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Masses of bacterial cells oozing out to the surface of affected plant parts is known as:
A.
Exudation
B.
Effusion
C.
Sporulation
D.
Germination
Question No. 18
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Yellowing of leaves due to lack of chlorophyll is called:
A.
Necrosis
B.
Etiolation
C.
Chlorosis
D.
Wilt
Question No. 19
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Death of tissues or cells is referred to as:
A.
Chlorosis
B.
Etiolation
C.
Necrosis
D.
Wilt
Question No. 20
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Abnormal increase in organ size due to an increase in the number of cells is called:
A.
Hypertrophy
B.
Hyperplasia
C.
Atrophy
D.
Hypoplasia
Question No. 21
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Increased size of an organ due to an increase in cell size is called:
A.
Hyperplasia
B.
Hypertrophy
C.
Atrophy
D.
Hypoplasia
Question No. 22
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Arched, twisted, and curled leaves are indicative of which symptom?
A.
Wilt
B.
Curl
C.
Blight
D.
Canker
Question No. 23
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Drying or drooping of leaves due to loss of turgor is called:
A.
Blight
B.
Curl
C.
Wilt
D.
Canker
Question No. 24
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Stem rot at the soil level in seedlings, often caused by *Pythium* spp., is known as:
A.
Blight
B.
Damping off
C.
Canker
D.
Die-back
Question No. 25
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A burnt-like appearance on plant parts is characteristic of:
A.
Canker
B.
Die-back
C.
Blight
D.
Damping off
Question No. 26
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A dead area in the bark or cortex of woody plants is called a:
A.
Blight
B.
Canker
C.
Die-back
D.
Damping off
Question No. 27
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Drying of twigs and branches from the top downwards is known as:
A.
Damping off
B.
Canker
C.
Die-back
D.
Blight
Question No. 28
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What is the basic structural unit of fungi?
A.
Hyphae
B.
Mycelium
C.
Sporangia
D.
Conidia
Question No. 29
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What is the collective term for the vegetative body of a fungus?
A.
Sporangium
B.
Hyphae
C.
Mycelium
D.
Conidium
Question No. 30
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Which of the following is NOT a characteristic of fungi?
A.
Presence of chlorophyll
B.
Heterotrophic nutrition
C.
Cell wall made of chitin
D.
Reproduction by spores
Question No. 31
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How do fungi typically reproduce?
A.
Binary fission
B.
Budding
C.
Spore production
D.
Fragmentation
Question No. 32
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What are the asexual spores produced by some fungi called?
A.
Zoospores
B.
Oospores
C.
Zygospores
D.
Ascospores
Question No. 33
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Which type of sexual reproduction involves the fusion of two morphologically similar gametangia?
A.
Oogamy
B.
Isogamy
C.
Heterogamy
D.
Plasmogamy
Question No. 34
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Which type of sexual reproduction leads to the development of oospores?
A.
Isogamy
B.
Oogamy
C.
Karyogamy
D.
Plasmogamy
Question No. 35
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Which of the following is a common group of plant disease fungi?
A.
Ustilaginales (Smut fungi)
B.
Ascomycetes
C.
Basidiomycetes
D.
Deuteromycetes
Question No. 36
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Which of the following is another common group of plant disease fungi?
A.
Uredinales (Rust fungi)
B.
Zygomycetes
C.
Oomycetes
D.
Chytridiomycetes
Question No. 37
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Powdery mildews are caused by which group of fungi?
A.
Erysiphaceae
B.
Peronosporaceae
C.
Ustilaginales
D.
Uredinales
Question No. 38
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Downy mildews are caused by which group of fungi?
A.
Peronosporaceae
B.
Erysiphaceae
C.
Ustilaginales
D.
Uredinales
Question No. 39
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What is the function of conidia in fungi?
A.
Sexual reproduction
B.
Asexual reproduction
C.
Nutrient absorption
D.
Protection from desiccation
Question No. 40
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In which fungal groups are pycnidia, sporodochia, and acervali found?
A.
Ascomycotina and Deuteromycotina
B.
Zygomycetes
C.
Basidiomycetes
D.
Chytridiomycetes
Question No. 41
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What is the primary component of the fungal cell wall?
A.
Cellulose
B.
Chitin
C.
Peptidoglycan
D.
Pectin
Question No. 42
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Which of the following describes the hyphae of fungi?
A.
Filamentous and multicellular
B.
Unicellular and spherical
C.
Flagellated and motile
D.
Non-filamentous and unicellular
Question No. 43
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What is the role of spores in fungal reproduction?
A.
Dispersal and propagation
B.
Nutrient storage
C.
Protection from predators
D.
Attachment to a substrate
Question No. 44
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Which of the following best describes the nutritional mode of fungi?
A.
Autotrophic
B.
Heterotrophic
C.
Parasitic only
D.
Saprophytic only
Question No. 45
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What is the process by which two fungal gametes fuse during sexual reproduction called?
A.
Plasmogamy
B.
Karyogamy
C.
Meiosis
D.
Mitosis
Question No. 46
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Which of the following structures are involved in sexual reproduction in some fungi?
A.
Cleistothecium, perithecium, apothecium
B.
Sporangia
C.
Conidiophores
D.
Rhizoids
Question No. 47
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Which term refers to the union of two morphologically dissimilar gametes in fungi?
A.
Isogamy
B.
Oogamy
C.
Heterogamy
D.
Plasmogamy
Question No. 48
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Which of these is a characteristic of true fungi?
A.
Cell wall made of cellulose
B.
Presence of chlorophyll
C.
Multicellularity in all forms
D.
Cell wall made of chitin
Question No. 49
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What is the term for the branching filaments that make up the mycelium?
A.
Hyphae
B.
Spores
C.
Conidia
D.
Sporangia
Question No. 50
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Which of the following is NOT a method of asexual reproduction in fungi?
A.
Spore production
B.
Budding
C.
Fragmentation
D.
Conjugation
Question No. 51
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Which type of fungi are known to cause smut diseases in plants?
A.
Ustilaginales
B.
Uredinales
C.
Erysiphaceae
D.
Peronosporaceae
Question No. 52
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Rust diseases in plants are caused by which group of fungi?
A.
Uredinales
B.
Ustilaginales
C.
Erysiphaceae
D.
Peronosporaceae
Question No. 53
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Which fungi are responsible for powdery mildews?
A.
Erysiphaceae
B.
Peronosporaceae
C.
Ustilaginales
D.
Uredinales
Question No. 54
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What is the role of sporangia in fungal reproduction?
A.
Produce spores
B.
Produce hyphae
C.
Produce gametes
D.
Produce fruiting bodies
Question No. 55
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Which of the following structures are associated with asexual spore production in some fungi?
A.
Conidiophores
B.
Ascospores
C.
Basidiospores
D.
Zygospores
Question No. 56
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Which of these is a characteristic of Ascomycotina fungi?
A.
Production of ascospores in asci
B.
Presence of basidia
C.
Formation of zygospores
D.
Motile zoospores
Question No. 57
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Deuteromycotina fungi are also known as?
A.
Imperfect fungi
B.
Sac fungi
C.
Club fungi
D.
Algal fungi
Question No. 58
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Which of these describes the sexual reproduction of fungi?
A.
Fusion of gametes
B.
Binary fission
C.
Budding
D.
Fragmentation
Question No. 59
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What is the result of plasmogamy in fungal sexual reproduction?
A.
Fusion of cytoplasm
B.
Fusion of nuclei
C.
Meiosis
D.
Mitosis
Question No. 60
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Karyogamy in fungi results in?
A.
Fusion of nuclei
B.
Fusion of cytoplasm
C.
Meiosis
D.
Mitosis
Question No. 61
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Which process follows karyogamy in sexual reproduction of fungi?
A.
Meiosis
B.
Mitosis
C.
Plasmogamy
D.
Sporulation
Question No. 62
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What are cleistothecia, perithecia, and apothecia?
A.
Fruiting bodies of some fungi
B.
Asexual spores
C.
Types of hyphae
D.
Reproductive enzymes
Question No. 63
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Which of the following is NOT a function of the fungal cell wall?
A.
Protection
B.
Structural support
C.
Nutrient absorption
D.
Selective permeability
Question No. 64
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What is the significance of the absence of chlorophyll in fungi?
A.
They cannot produce their own food
B.
They can perform photosynthesis
C.
They can live in any environment
D.
They can reproduce asexually
Question No. 65
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Which of the following is an example of a unicellular fungus?
A.
Yeast
B.
Mushroom
C.
Mold
D.
Rust
Question No. 66
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What is the primary role of the mycelium in fungi?
A.
Nutrient absorption
B.
Spore production
C.
Sexual reproduction
D.
Protection
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