Bhu Pre-PG Old Question Paper 2020
1. Which one of the following is an example of a fungal biocontrol agent effective against soil-borne fungal pathogens?
(1) Trichoderma harzianum
(2) Bacillus subtillis
(3) Pseudomonas flurescens
(4) Arthrobotrys oligospora
Trichoderma harzianum
2. The method of transmission of loose smut of wheat pathogen is?
(1) Externally seed borne
(2) Internally seed borne
(3) Soil borne
(4) Air borne
Internally seed borne
3. Name the structure of pathogen of late blight of potato responsible for survival of the disease in plains of India?
(1) Oospore present in soil
(2) Sporangia present in plant debris
(3) Mycellium present in plant debris
(4) Dormant hyphae present in tubers stored in cold storage
Dormant hyphae present in tubers stored in cold storage
4. The teliospores of Puccina graminis tritici is?
(1) Unicellular
(2) Two celled
(3) Three celled
(4) Multi celled
Two celled
5. Fruit having feet in water and head in fire?
(1) Fig
(2) Water chestnut
(3) Datepalm
(4) Walnut
Datepalm
6. The botanical form of kiwi is?
(1) Drupe
(2) Berry
(3) Pome
(4) Nut
Berry
7. Bishop is a variety of?
(1) Apple
(2) Mango
(3) Coconut
(4) Citrus
Apple
8. Granulation is serious problem in?
(1) Strawberry
(2) Grape
(3) Mango
(4) Citrus
Citrus
9. Ultra dwarf rootstock of apple is?
(1) M-9
(2) M-27
(3) MM-106
(4) MM-111
M-27
10. Vigna unguiculata is the botanical name of?
(1) Cowpea
(2) French bean
(3) Cluster bean
(4) Garden pea
Cowpea
11. A breeding method in self-pollinated crops where many desirable plants of similar phenotypes are selected and their seeds are mixed to constitute the new variety is known as?
(1) Pure line selection
(2) Mass selection
(3) Pedigree selection
(4) Backcross selection
Mass selection
12. The recurrent selection method most suitable for improvement of two populations simultaneously for hybrid development is?
(1) Simple recurrent selection
(2) Reciprocal recurrent selection
(3) Recurrent selection for GCA
(4) Recurrent selection for SCA
Reciprocal recurrent selection
13. Okazaki fragments referred to?
(1) Short DNA sequence synthesized on lagging stand
(2) Short DNA sequence synthesized on leading stand
(3) Short RNA sequence synthesized on lagging stand
(4) Short RNA sequence synthesized on leading stand
Short DNA sequence synthesized on lagging stand
14. How many phenotypes class is possible in F2 if two genes expressing co-dominance in F1 segregating independently?
(1) 3
(2) 9
(3) 4
(4) 16
9
15. The concept of multiline varieties was given by?
(1) Jensen, 1952
(2) M.S. Swaminathan, 1967
(3) Barbara Maclintok, 1980
(4) Hugo de Veries, 1901
Jensen, 1952
16. Which one of the following true about orientation of two stands of DNA?
(1) Parallel to each other
(2) Anti-parallel to each other
(3) Circular to each other
(4) Perpendicular to each other
Anti-parallel to each other
17. If amount of guanine base is 35 % in a DNA, what will be amount of adenine base?
(1) 35 %
(2) 70%
(3) 15%
(4) 30 %
15%
18. In molecular assisted backcross breeding the background selection refers to?
(1) Introgression of donor gene
(2) Introgression of alien gene
(3) Sequencing of target gene
(4) Recovery of receptor genome
Recovery of receptor genome
19. Identify the plant which belongs to Crassulacean acid metabolism?
(1) Sunflower
(2) Ipomea
(3) Pineapple
(4) Citrus
Pineapple
20. What is the absorption peak of phytochrome Pfr?
(1) 580 nm
(2) 660 nm
(3) 700 nm
(4) 730 nm
730 nm
21. Mustard sawfly lays egg on?
(1) Soil
(2) Petiole
(3) Flower Buds
(4) Leaf margins
Leaf margins
22. Indian grain storage research & training institute was established in?
(1) 1956
(2) 1958
(3) 1960
(4) 1962
1958
23. Rearing of stingless bee is known as?
(1) Bee culture
(2) Apiculture
(3) Melliponiculture
(4) Iridiculture
Melliponiculture
24. Fossorial legs are found in?
(1) Mole cricket
(2) House cricket
(3) Springtail
(4) Fire brats
Mole cricket
25. Litchi erineum mite belongs to the family?
(1) Tetranychidae
(2) Eriophyidae
(3) Tenupalpide
(4) Bdellidae
Eriophyidae
26. Vector of little leaf of brinjal is?
(1) Mite
(2) Plant Hopper
(3) Aphid
(4) Leaf Hopper
Leaf Hopper
27. Which one the following is not an acaricide?
(1) Dicofol
(2) Spiromessifen
(3) Fenbulatin oxide
(4) Acctamiprid
Acctamiprid
28. Pollu beetle is a major pest of?
(1) Pepper
(2) Cardamom
(3) Turmeric
(4) Ginger
Pepper
29. “T” Shaped marking on marble-sized mango fruits is a symptom produced by?
(1) Nut weevil
(2) Fruit fly
(3) Fruit borer
(4) Midge
Nut weevil
30. Which one the following orders have sponging type of mouths parts?
(1) Coleoptera
(2) Lepidoptera
(3) Trichoptera
(4) Diptera
Diptera
31. Fenoxycarb is a?
(1) Juvenile hormone Analogue
(2) Ecdysteroid
(3) Chitin synthesis inhibitor
(4) Nicotinoid
Juvenile hormone Analogue
32. Cochineal insect produces crimson colour dye, which is?
(1) Formic acid
(2) Carminic acid
(3) Lipophorim
(4) Lauric acid
Carminic acid
33. Which one of the following is a rust disease-causing fungal genus?
(1) Sclerospora
(2) Uncinula
(3) Uromyces
(4) Ascochyta
Uromyces
34. The common symptoms caused by phytoplasma infection is?
(1) Blight
(2) Enation
(3) Wilt
(4) Phyllody
Phyllody
35. Who established Phytophthora infestans as the causal agent of late blight of potato?
(1) Anton de bary
(2) T.J. Burril
(3) Louis Pasteur
(4) Anton van Leeuwenhoek
Anton de bary
36. Which one of the following fungicides is systematic in nature?
(1) Captan
(2) Carbendazim
(3) Dithane-M 45
(4) Thiram
Carbendazim
37. Which one of the following pathogens produces Zoospores?
(1) Pythium aphanidermatum
(2) Rhizictonia solani
(3) Botrytis cinerea
(4) Phoma lingum
Pythium aphanidermatum
38. Bacterial wilt of Solaneceous crop is caused by?
(1) Xanthomonas campertris pv. Campetris
(2) Erwinia carotovora
(3) Pectobacterium atrosepticum
(4) Ralstonia solanacearum
Ralstonia solanacearum
39. Rice Tungro bacilliform virus is transmitted by?
(1) Green leaf hopper
(2) Aphid
(3) Nematode
(4) White fly
Green leaf hopper
40. Panama wilt of banana is caused by?
(1) Fusarium oxysporum f. sp. ciceris
(2) Fusarium oxysporum f. sp. cubense
(3) Fusarium udom
(4) Fusarium oxysporum f. sp. Lycopersici
Fusarium oxysporum f. sp. cubense
