Q: Which microorganism is used in yogurt production?
Answer: Lactobacillus
Q: Maximum nematode population in soil occurs at which depth?
Answer: 10–20 cm
Q: Downy mildew disease primarily affects which crop?
Answer: Maize
Q: Organisms without a defined nucleus are classified as?
Answer: Prokaryotes
Q: Red rust of tea is caused by which algae?
Answer: Cephaleuros
Q: Udbatta disease affects which crop?
Answer: Rice
Q: Mycoplasma diseases are transmitted by which insects?
Answer: Leafhoppers
Q: Two major sugarcane diseases include?
Answer: Red rot and grassy shoot
Q: Tilletia indica causes which disease in wheat?
Answer: Karnal bunt
Q: Dithane Z-78 is a type of?
Answer: Dithiocarbamate fungicide
Q: Odd one out: Leafspot – Paddy; Zonate leaf spot – Sorghum; Red leaf – Sugarcane; Leaf blight – Wheat
Answer: Red leaf – Sugarcane
Q: First person to report Tobacco mosaic virus?
Answer: Mayer
Q: Pure crystalline form of TMV protein isolated by?
Answer: Stanley
Q: Bajra smut is caused by which fungus?
Answer: Tolyposorium penicillarie
Q: Tomato leaf curl disease is caused by?
Answer: Virus
Q: Transduction occurs in which organisms?
Answer: Bacteriophages
Q: Transformation occurs in which organisms?
Answer: Bacteria
Q: Family of Trichodorus nematode?
Answer: Trichodoridae
Q: Tundu disease affects which plant?
Answer: Wheat
Q: Who proved viruses can pass through bacteria-retaining filters?
Answer: Ivanowski
Q: Ufra disease affects which crop?
Answer: Rice
Q: Leaf curl of tobacco is caused by?
Answer: Nicotiana virus-10
Q: Uncinula causes which plant disease?
Answer: Powdery mildew
Q: First to use microscope to study microorganisms?
Answer: Antony Van Leeuwenhoek
Q: Virus transmitted by nematode?
Answer: Xiphinema
Q: Father of nematology?
Answer: N.A. Cobb
Q: What do bacterial cells form under unfavorable conditions?
Answer: Endospores
Q: Cellulose-decomposing fungi include?
Answer: Trichoderma, Aspergillus
Q: Fungus producing aflatoxin?
Answer: Aspergillus flavus
Q: Fungus suppressing soil pathogens?
Answer: Trichoderma viride
Q: Citrus nematode is?
Answer: Tylenchus
Q: Sulphur bacteria example?
Answer: Cladothrix
Q: Root-knot nematode is?
Answer: Meloidogyne
Q: Carbamate nematicide?
Answer: Aldicarb
Q: Nematode attacking above-ground parts?
Answer: Anguina
Q: Nutrient supplied by mycorrhiza?
Answer: Phosphorus
Q: Gram-positive bacterium example?
Answer: Corynebacterium
Q: Poisonous mushroom?
Answer: Amanita
Q: Period between inoculation and symptom appearance?
Answer: Latent period
Q: Systemic fungicides include?
Answer: Vitavax, Bavistin, Calisin
Q: Maintains nematode shape?
Answer: Pseudocoelomic fluid
Q: Downy mildew fungus?
Answer: Sclerospora
Q: Best control for ear cockle in wheat?
Answer: Mechanical separation of infected seeds
Q: Cause of citrus decline?
Answer: Nutritional deficiency
Q: Infection mode of Ergot in bajra?
Answer: Local infection of blossom
Q: Correct order in biocontrol operations?
Answer: Parasite, Mass rearing, Release, Parasitism
Q: Incorrect crop–disease match?
Answer: Karnal bunt – Neovossia horrida
Q: Correct crop–disease match?
Answer: Cucumber – Club root
Q: Sprayer fails to retain pressure – solution?
Answer: Tighten tank lid and gasket
Q: Sprayer needing lowest volume for rice?
Answer: Hand sprayer
Q: Economic threshold level?
Answer: Pest population where control is required to prevent economic loss
Q: Alternate host of pathogen?
Answer: Host required for fungus life cycle completion
Q: Tissue culture for virus-free potato?
Answer: Meristem tip
Q: Symbiotic relationship example?
Answer: Rhizobium
Q: First reported plant bacterial disease?
Answer: Fire blight of apple
Q: Whip smut of sugarcane?
Answer: Ustilago scitaminea
Q: White rust of crucifer?
Answer: Albugo
Q: First person to discover antibiotics?
Answer: Alexander Fleming
Q: 2n in genetics denotes?
Answer: Number of gamete types produced by F1
Q: Organism with one extra chromosome pair?
Answer: Tetrasomic
Q: Character determined by many genes?
Answer: Quantitative character
Q: Large vegetation unit under same climate?
Answer: Biome
Q: Pollination in unopened flower?
Answer: Cleistogamy
Q: Criss-cross inheritance example?
Answer: Sex-linked character
Q: Cybrid is?
Answer: Hybrid by cell fusion
Q: Dry one-seeded fruit with hard pericarp?
Answer: Caryopsis
Q: Fruit from inflorescence?
Answer: Composite fruit
Q: Fruit from apocarpous pistil?
Answer: Aggregate fruit
Q: Male gametes formed by generative nucleus division?
Answer: Mitosis
Q: Head or capitulum characteristic?
Answer: Compositae
Q: Zamikand and Taro are?
Answer: Corm
Q: Homozygous line from selfing?
Answer: Inbred
Q: Hybrid is always?
Answer: Heterozygous
Q: Large natural vegetation unit?
Answer: Plant formation
Q: Maintainer line?
Answer: Male fertile but cannot restore fertility
Q: Male child chromosome composition?
Answer: XY
Q: Male gametophyte contains?
Answer: Two male gametes + one tube nucleus
Q: Method for vegetatively propagated crop variation?
Answer: Polyploidy
Q: Mixture of immiscible liquids?
Answer: Emulsion
Q: Plant with both male and female flowers?
Answer: Monoecious
Q: Why plant cell doesn’t burst in hypotonic solution?
Answer: Inelastic cell wall
Q: Plant with 2n = 20 has how many linkage groups?
Answer: 10
Q: Genotype Gg Ww produces which gametes?
Answer: GW, Gw, gW, gw
Q: Solubility of solid in liquid with temperature increase?
Answer: Increases
Q: Restorer gene is present in?
Answer: Nucleus
Q: Stage when homologous chromosomes separate in meiosis?
Answer: Anaphase I
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