JNKVV & RVSKVV PhD Plant Pathology Entrance Exam 2024
JNKVV & RVSKVV PhD Plant Pathology Entrance Exam 2024
Q.1 The black bodies formed on potato tubers infected with scurf are?
- Chlamydospores
- Pycnidia
- Cleistothecia
- Sclerotia
Q.2 Gene for gene concept was first proved for?
- Late blight of potato
- Apple crown gall
- Apple fire blight
- Rust disease of flax
Q.3 The two-step secretion system specialized in exporting proteins and protein complexes that must be folded or assembled in cytoplasm?
- Sec (Secretion) export system
- Tat (Twin-arginine translocase) export system
- Type II Secretion System
- Type I Secretion System
Q.4 The main virulence factor of Ralstonia solanacearum causing bacterial wilt in solanaceous plants is?
- Toxins
- Exopolysaccharides
- Enzymes
- Growth regulators
Q.5 The acronym MAMP stands for?
- Micro Associated Molecular Pattern
- Microbe Associated Modified Pattern
- Microbe Associated Molecular Pattern
- Molecular Associated Microbe Pattern
Q.6 Variation in bacteria does NOT arise due to?
- Mutation
- Anastomosis
- Transformation
- Conjugation
Q.7 The most important cell wall degrading enzyme in pathogenesis of plant pathogenic bacteria is?
- Cellulase
- Protease
- Pectinase
- Xylanase
Q.8 The secretion system conserved in most Gram-negative bacteria is?
- Type I Secretion System
- Type II Secretion System
- Type III Secretion System
- Type IV Secretion System
Q.9 Which of the following statements is NOT true for Agrobacterium tumefaciens?
- It has a three component signal sensing system with VirA, VirG and VirD proteins
- It has a two component signal sensing system with VirA and VirG proteins
- VirA is a membrane sensor protein
- VirG is a cytoplasmic response regulator protein
Q.10 The resistance gene against the fungus Cladosporium fulvum originating from wild tomato species is?
- Cf9
- Avr4
- Avr9
- Cf11
Q.11 Which genus causes most of the wilt diseases in vegetables?
- Agrobacterium
- Xanthomonas
- Erwinia
- Ralstonia
Q.12 The plant pathogen which is not prokaryotic in nature?
- Bacteria
- Spiroplasma
- Phytoplasma
- Protozoa
Q.13 Method of sexual reproduction in Agaricus campestris is?
- Planogametic copulation
- Spermatization
- Somatogamy
- Gametangial contact
Q.14 Mycoparasitism is associated with?
- Cercospora
- Trichoderma
- Alternaria
- Septoria
Q.15 First plant pathogen whose whole genome was sequenced completely?
- Xylella fastidiosa
- Agrobacterium tumefaciens
- Pseudomonas syringae
- Xanthomonas oryzae
Q.16 In conjugation, which one of the following is transferred from donor to recipient bacterial cell?
- Part of chromosome DNA
- Total plasmid DNA
- Part of chromosome DNA and total plasmid DNA
- Copy of entire chromosome DNA or total plasmid DNA
Q.17 VAM represents?
- Symbiotic fungi
- Symbiotic bacteria
- Saprophytic fungi
- Saprophytic bacteria
Q.18 The pigment melanin is produced by the plant pathogenic bacteria?
- Xanthomonas oryzae
- Erwinia carotovora
- Agrobacterium tumefaciens
- Streptomyces scabies
Q.19 In ascocarp, paraphyses fuse together forming a layer known as?
- Epithecium
- Pseudothecium
- Apothecium
- Perithecium
Q.20 Host specificity of a plant pathogen is determined by?
- hrp genes
- Avr genes
- pat genes
- vir genes
Q.21 The duration of spawn running for shiitake mushroom is?
- 1 week
- 2-4 weeks
- 4-8 weeks
- 8-12 weeks
Q.22 Which one of the antibiotics is not produced from actinomycetes?
- Tetracycline
- Polymixin
- Neomycin
- Erythromycin
Q.23 The purple blotch of onion is caused by?
- Alternaria solani
- Alternaria dauca
- Alternaria alternata
- Alternaria porri
Q.24 Erwinia enters potato plant through?
- Hydathodes
- Lenticels
- Stomata
- Wounds
Q.25 Sexual spores produced by the genus Cochliobolus?
- Basidiospores
- Ascospores
- Oospores
- Zygospores
Q.26 Which of the following is referred to as king of medicinal mushrooms?
- Maitake (Grifola frondosa)
- Chaga (Inonotus obliquus)
- Truffles (Tuber aestivum)
- Oyster mushroom (Pleurotus florida)
Q.27 The capacity of an optical system to distinguish two adjacent points from one another is?
- Magnification
- Numerical aperture
- Resolving power
- Curvature
Q.28 Dictyospore, brown, obclavate with beak, 3-8 transversely septate and 1-2 longitudinally septate conidia produced by which of the following genera?
- Phytophthora
- Alternaria
- Pythium
- Helminthosporium
Q.29 Circinoid/ hooked/coiled cleistothecial appendages present in which of the following powdery mildew genera?
- Uncinula
- Erysiphe
- Phyllactinia
- Microsphaera
Q.30 An example of Rhizomorph?
- Sclerotium
- Armillaria
- Rhizopus
- Rhizoctonia
Q.31 Spores produced through fragmentation?
- Arthrospores
- Blastospores
- Basidiospores
- Zygospores
Q.32 A biocontrol agent for the management of powdery mildew fungi is?
- Pasteuria penetrans
- Darluca filum
- Ampelomyces quisqualis
- Pichia gulliermondii
Q.33 Genus Venturia belongs to the class?
- Leotiomycetes
- Dothideomycetes
- Eurotiomycetes
- Sordariomycetes
Q.34 Zoospores are differentiated inside the vesicle in which of the following genera?
- Phytophthora
- Pythium
- Albugo
- Bremia
Q.35 Clamp connections are found in the genus?
- Ustilago
- Erysiphe
- Phoma
- Puccinia
Q.36 The asci in which ascus wall is thin and dissolves to release ascospores at maturity are?
- Protunicate
- Bitunicate
- Unitunicate
- Fissitunicate
Q.37 Sickle shaped, guttulate, hyaline and single celled conidia found in which of the following genera?
- Colletotrichum
- Sclerotium
- Rhizoctonia
- Pestalotia
Q.38 The fungi which produce distinguishing male and female sex organs on different thallus are called as?
- Dioecious
- Hermaphroditic
- Monoecious
- Homothallic
Q.39 Asexual fruiting body in which the conidiophores are cemented together is?
- Acervuli
- Sporodochium
- Synnema
- Pycnidium
Q.40 Identify the correct statement?
- Fungi usually prefer pH 6.0-6.5
- Bacteria usually prefer pH 8.0
- Fungi prefer pH 7.5-8.0
- Bacteria prefer pH 8.5
Q.41 Source of illumination of fluorescent microscope is?
- Visible light
- Electron beam
- UV rays
- X-rays
Q.42 Micrometry is?
- Measuring a microscopic object
- Counting of microscopic objects
- Observing microscopic objects
- Multiplying of microscopic objects
Q.43 Asexual stage is honeydew stage in which of the following genera?
- Puccinia graminis
- Taphrina maculans
- Albugo candida
- Claviceps purpurea
Q.44 The first plant quarantine measure in India dating back to 1906 was in response to the danger of introduction of this pest?
- Colorado potato beetle
- Mexican boll weevil
- Potato wart
- Citrus canker
Q.45 The DCPA (Dichloran Peptone Chloramphenicol Agar) medium is used to identify Fusarium because it induces the formation of?
- Microconidia
- Macroconidia
- Microconidia and macroconidia
- Chlamydospores
Q.46 The mycotoxin patulin is produced by the following fungus?
- Claviceps purpurea
- Aspergillus flavus
- Penicillium expansum
- Fusarium roseum
JNKVV & RVSKVV PhD Plant Pathology Entrance Exam 2024
Q.47 Control of pathogens that are externally or passively present on the seed surface?
- Seed disinfection
- Seed disinfestation
- Seed protection
- Seed sorting
Q.48 Spiroplasmas were first discovered in association with the following disease?
- Corn stunt
- Citrus stubborn
- Barley stunt
- Aster yellows
Q.49 An example of a seedborne viroid disease is?
- Potato spindle tuber
- Wheat streak mosaic
- Tobacco streak
- Apple mosaic
Q.50 Identify the correct pair of contributor and the scientific contribution?
- Burrill – Club root of cabbage
- Adolph Mayer – Bacillus anthracis
- Needham – Nematode
- Woronin – Fire blight of apple
Q.51 The most common storage fungus of seeds belongs to the genus?
- Aspergillus
- Cercospora
- Phytophthora
- Pythium
Q.52 Which of the following diseases is not a seed-borne disease?
- Bajra downy mildew
- Tomato early blight
- Rice sheath rot
- Cucurbits powdery mildew
Q.53 Identify the correct host-pathogen pair?
- Watermelon – Fusarium oxysporum f.sp. niveum
- Chickpea – Fusarium oxysporum f.sp. vasinfectum
- Redgram – Fusarium oxysporum f.sp. phaseoli
- Sunflower – Fusarium oxysporum f.sp. carthami
Q.54 The pathogen Erwinia stewartii causes leaf blight/Stewart’s wilt in the crop?
- Rice
- Maize
- Sugarcane
- Sorghum
Q.55 What is the full form of ICTV?
- International Congress on Taxonomy of Viruses
- International Committee on Taxonomy of viruses
- International Committee on Taxonomy of Viroids
- International Congress on Taxonomy of Viroids
Q.56 Black rot of crucifers is caused by?
- Xanthomonas campestris pv campestris
- Phoma lingam
- Protomyces macrosporus
- Alternaria brassicola
Q.57 Flag smut of wheat was introduced in India from?
- Canada
- Australia
- Mexico
- USA
Q.58 The book “Fungicides in Plant Disease Control” was authored by?
- N. Kamat
- J. Butler
- B. Mundkur
- L. Nene
Q.59 In a disease progress curve, the slowing down of disease progress refers to?
- The plateau
- Transitional phase
- Lag phase
- Logarithmic phase
Q.60 Identify the viral disease in the following?
- Citrus tristeza
- Coconut cadang cadang
- Chrysanthemum stunt
- Potato spindle tuber
Q.61 The pathogen causing stem bleeding in arecanut also causes the following disease?
- Pear late storage rot
- Pineapple black rot
- Cucurbits stem end rot
- Onion white rot
Q.62 The nematode genus Heterodera does not infect this crop?
- Brinjal
- Soybean
- Sugarbeet
- Tobacco
Q.63 Which of the following phanerogamic parasite germinates and produces shoots without roots?
- Giant mistletoe (Dendrophthoe)
- Dodder (Cuscuta)
- Broomrape (Orobanche)
- Witch weed (Striga)
Q.64 The first fungal avirulent gene isolated was?
- Xa21
- Avr9
- Hm-1
- Avr6
Q.65 Indian Phytopathological Society was established during the year?
- 1958
- 1948
- 1928
- 1918
Q.66 The father of Indian Mycology is?
- R. Bose
- Mundkur
- J. Butler
- M. Fries
Q.67 Which of the following has been recognized as the first plant pathogen?
- Phytophthora infestans
- Bacillus subtilis
- Mistletoe
- Tilletia
Q.68 The nucleic acid of maize streak virus is?
- ds DNA
- ss DNA
- ds RNA
- ss RNA
Q.69 Viroids are sensitive to?
- DNase
- RNase
- RNA Polymerase
- DNA Polymerase
Q.70 ELISA assay cannot be used to detect this group of plant pathogens?
- Fungi
- Bacteria
- Viruses
- Viroids
Q.71 Which of the following plant pathogens can form perithecia?
- Diaporthe
- Blumeria
- Erysiphe
- Podosphaera
Q.72 Which of the following best describes cucumber mosaic virus?
- Bacilliform, ssRNA
- Rod shaped, dsRNA
- Isometric, ssRNA
- Bacilliform, dsRNA
Q.73 Which one of the following represents the ‘basal group’ of primitive ascomycetes?
- Taphrinomycotina
- Saccharomycotina
- Pezizomycotina
- Ascomycotina
Q.74 Sporangiophore is indistinguishable from somatic hyphae and indeterminate in?
- Peronospora
- Phytophthora
- Pythium
- Plasmopara
Q.75 Pleospora is the teleomorph stage of?
- Cercospora
- Paecilomyces
- Septoria
- Stemphylium
Q.76 The phenolic compound formed in apple in response to injury or infection is?
- Rishitin
- Phytuberin
- Phloretin
- Esculentin
Q.77 Glucans are general elicitors of?
- Oomycetous pathogens
- Higher fungi
- Plant pathogenic bacteria
- Viruses
Q.78 The non host-specific toxin produced by Streptomyces?
- Tentoxin
- Thaxtomin
- Patulin
- Aflatoxin
Q.79 Which of the following is not a PR protein?
- Chitinase
- Defensin
- Caffeic acid
- Chitosanase
Q.80 The turgor pressure developed in appressorium produced by fungi is due to the accumulation of?
- Glucose
- Glycerol
- Glycogen
- Glucan
Q.81 The key factor(s) for prediction system of late blight of potato is?
- Temperature
- Moisture
- Temperature and moisture
- Temperature, moisture and source of inoculum
Q.82 Witches broom of cacao is caused by?
- Fungus
- Phytoplasma
- Virus
- Fastidious prokaryotes
Q.83 The apple scab pathogen Venturia is?
- Biotroph
- Hemibiotroph
- Facultative saprophyte
- Facultative parasite
Q.84 Rust disease of soybean is caused by?
- Puccinia
- Uromyces
- Phragmidium
- Phakopsora
Q.85 The favorable temperature for growth and sporulation of Phytophthora infestans is?
- 5-10°C
- 15-25°C
- 25-30°C
- 30-35°C
Q.86 Downy mildew of sunflower is caused by?
- Pseudoperonospora cubensis
- Plasmopara halstedii
- Sclerophthora macrospora
- Peronospora destructor
Q.87 The sexual fruiting body of powdery mildew is?
- Perithecium
- Cleistothecium
- Apothecium
- Ascostroma
Q.88 The asexual fruiting body produced by Fusarium is?
- Acervulus
- Synnema
- Sporodochium
- Pycnidium
Q.89 Which one of the following fungicides is known as ‘Kittleson’s killer’?
- Kitazin
- Mercuric chloride
- Captan
- Karathane
Q.90 Mancozeb is an example of?
- Copper fungicide
- Sulphur fungicide
- Mercurial fungicide
- Heterocyclic nitrogenous compound
Q.91 An example of a systemic fungicide?
- Mancozeb
- Captan
- Carbendazim
- Chlorothalonil
Q.92 Which of the following fungicides is specific against rust diseases?
- Metalaxyl
- Mancozeb
- Plantavax
- Vitavax
Q.93 An example of oxathin group of chemicals is?
- Hexaconazole
- Azoxystrobin
- Carboxin
- Fosetyl-Al
Q.94 The trade name of hexaconazole is?
- Cosan
- Apron
- Tilt
- Contaf
Q.95 Which of the following is an example of anti-fungal antibiotic?
- Griseofulvin
- Tetracycline
- Streptomycin
- Agrimycin-I
Q.96 The most effective soil drenching fungicide is?
- Thiram
- Carbendazim
- Chlorothalonil
- Mancozeb
Q.97 The signaling molecule for systemic acquired resistance is?
- Salicylic acid
- Jasmonic acid
- Ethylene
- Jasmonic acid and Ethylene
Q.98 An example for cytokinin isolated from plants is?
- Zeatin
- Kinetin
- IAA
- IBA
Q.99 An example of a bacterial biocontrol agent to control root knot nematode is?
- Ampelomyces quisqualis
- Pasteuria penetrans
- Paecilomyces lilacinus
- Darluca filum
Q.100 An example of a compound interest disease is?
- Stem rust of wheat
- Wheat smut
- Sorghum smut
- Turmeric leaf spot
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