Objective type solved question papers of Nematology

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1. Who is the present Chairman of Protection of
Plant Varieties and Farmers' Right Authority
(PPV&FRA)?
a) Dr. R.R. Hanchinal
b) Dr. P.L. Gautam
c) Dr. S. Nagarajan
d) Dr. Swapan K. Datta
2. Which among the following is another name
for vitamin B12?
a) Niacin
b) Pyridoxal phosphate
c) Cobalamin
d) Riboflavin
3. The largest share in India's farm export
earning in the year 2011-12 was from
a) Basmati rice
b) Non-basmati rice
c) Sugar
d) Guar gum
4. The National Bureau of Agriculturally
Important Insects was established by ICAR
in ________, was earlier known as _______.
a) Bangalore; PDBC
b) New Delhi; National Pusa Collection
c) Ranchi; Indian Lac Research Institute
d) New Delhi; NCIPM
5. The most important sucking pests of cotton
and rice are respectively
a) Nilaparvata lugens and Aphis gossypii
b) Aphis gossypii and Thrips oryzae
c) Amrasca biguttula biguttula and Scirtothrips
dorsalis
d) Thrips gossypii and Orseolia oryzae
6. Which of the following microorganism causes
fatal poisoning in canned fruits and
vegetables?
a) Aspergillus flavus
b) Penicillium digitatum
c) Clostridium botulinum
d) Rhizoctonia solani
7. The cause of the great Bengal Famine was
a) Blast of rice
b) Brown spot of rice
c) Rust of wheat
d) Karnal bunt of wheat
8. Actinomycetes belong to
a) The fungi
b) Eukaryote
c) Mycelia sterilia
d) None of the above
9. A virus-free clone from a virus infected plant
can be obtained by
a) Cotyledonary leaf culture
b) Axenic culture
c) Stem culture
d) Meristem tip culture
10. Which of the following is not an objective of
the National Food Security Mission?
a) Sustainable increase in production of rice,
wheat and pulses
b) Restoring soil fertility and productivity at
individual farm level
c) Promoting use of bio-pesticides and organic
fertilizers
d) Creation of employment opportunities
11. Agmarknet, a portal for the dissemination of
agricultural marketing information, is a joint
endeavour of
a) DMI and NIC
b) DMI and Ministry of Agriculture
c) NIC and Ministry of Agriculture
d) DMI and Directorate of Economics and
Statistics
12. The share of agriculture and allied activities
in India's GDP at constant prices in 2011-12
was
a) 14.1%
b) 14.7%
c) 15.6%
d) 17.0%
13. The average size of land holding in India
according to Agricultural Census 2005-06 is
a) 0.38 ha
b) 1.23 ha
c) 1.49 ha
d) 1.70 ha
14. 'Farmers First' concept was proposed by
a) Paul Leagans
b) Neils Rolling
c) Robert Chamber
d) Indira Gandhi
15. In the year 2012, GM crops were cultivated
in an area of
a) 150 million hectare in 18 countries
b) 170 million hectare in 28 countries
c) 200 million hectare in 18 countries
d) 1.70 million hectare in 28 countries
16. The broad-spectrum systematic herbicide
glyphosate kills the weeds by inhibiting the
biosynthesis of
a) Phenylalanine
b) Alanine
c) Glutamine
d) Cysteine
17. At harvest, the above ground straw (leaf,
sheath and stem) weight and grain weight of
paddy crop are 5.5 and 4.5 tonnes per
hectare, respectively. What is the harvest
index of paddy?
a) 45%
b) 50%
c) 55%
d) 100%
18. Crossing over between non-sister
chromatids of homologous chromosomes
takes place during
a) Leptotene
b) Pachytene
c) Diplotene
d) Zygotene
19. The term 'Heterosis' was coined by
a) G.H. Shull
b) W. Bateson
c) T.H. Morgan
d) E.M. East
20. When a transgenic plant is crossed with a
non-transgenic, what would be the zygosity
status of the F1 plant?
a) Homozygous
b) Heterozygous
c) Hemizygous
d) Nullizygous
21. The highest per capita consumption of
flowers in the world is in
a) The USA
b) India
c) Switzerland
d) The Netherlands
22. Which of the following is a very rich source of
betalain pigment?
a) Radish
b) Beet root
c) Carrot
d) Red cabbage
23. Dog ridge is
a) Salt tolerant rootstocks of mango
b) Salt tolerant rootstocks of guava
c) Salt tolerant rootstocks of grape
d) Salt tolerant rootstocks of citrus
24. Which of the following micronutrients are
most widely deficient in Indian soils?
a) Zinc and boron
b) Zinc and iron
c) Zinc and manganese
d) Zinc and copper
25. Which of the following fertilizers is not
produced in India?
a) DAP
b) Urea
c) Muriate of potash
d) TSP
26. What is the estimated extent of salt affected
soils in India?
a) 5.42 mha
b) 7.42 mha
c) 11.42 mha
d) 17.42 mha
27. Which of the following is not a feature of
watershed?
a) Hydrological unit
b) Biophysical unit
c) Socio-economic unit
d) Production unit
28. Correlation coefficient 'r' lies between
a) 0 and 1
b) -1 and 1
c) -1 and 0
d) 0 and 
29. For the data 1, -2, 4, geometric mean is
a) 2
b) 4
7
c) - 
3
d) -2
30. The relationship between Arithmetic mean
(A), Harmonic mean (H) and Geometric
mean (G) is
a) G2=AH
b) G= A+H
c) H2=GA
d) A2=GH
31. The three dimensional rings formed by the
fungus to trap nematode is
a) Fusarium oxysporum
b) Trichoderma viride
c) Arthrobotrys oligospora
d) Catenaria vermicola
32. The size of egg sac bigger than the cyst size
is found in
a) Heterodera zeae
b) Heterodera sorghi
c) Heterodera mothi
d) Heterodera cajani
33. Which one of the following is not correct?
a) Deeper transverse striae visible with light
microscope are annule
b) Transverse striae not universal among
nematode
c) Incisures involve epicuticle and only part of
exocuticle
d) Overlapping annulation is not always
posteriorly directed
34. The caudal alae are greatly reduced or
degenerate in
a) Rotylenchus
b) Rotylenchulus
c) Pratylenchus
d) Tylenchorhynchus
35. Which one of the following is not correct?
a) Germinal zone is always relatively longer
b) Hologonic ovaries are restricted to a few
parasitic groups
c) Majority of nematodes have telogonic
ovaries
d) Central protoplasmic core around which
germ cells are aggregated is called rachis
36. Which one of the following is not correct?
a) Largest size egg is encountered in
Placentonema gigantissima
b) In some nematodes, egg shell may be four
layered
c) Most nematodes contain chitin in egg shell
d) The largest size nematode egg measures
0.87-1.1 mm  0.24-0.35 mm
37. In Tylenchulus semipenetrans, the excretory
pore is located at about
a) 25% of body length
b) 45% of body length
c) 80% of body length
d) 95% of body length
38. Males consistently with degenerate feeding
apparatus and reduced stylet are found in
a) Radopholus
b) Pratylenchus
c) Nacobbus
d) Hirschmanniella
39. Which one of the following sugar residues is
not detected on cuticular receptor sites of
nematodes?
a) Galactose
b) Mannose
c) Glucose
d) Maltose
40. Which of the following is the enzyme of
pentosephosphate pathway encountered in
nematodes?
a) Fumerase
b) Lactate dehydrogenase
c) 6-phosphogluconic dehydrogenase
d) Enolase
41. The principal nitrogenous excretory product
in nematode is
a) NH3
b) Urea
c) Peptides
d) Uric acid
42. Which of the following nematodes is cortical
tissue feeder?
a) Heterodera
b) Meloidogyne
c) Rotylenchulus
d) Pratylenchus
43. Root-knot disease was first recorded in
a) 1850
b) 1855
c) 1865
d) 1875
44. Which one of the following root-knot
nematodes is cryophylic?
a) Meloidogyne exigua
b) Meloidogyne chitwoodi
c) Meloidogyne oryzae
d) Meloidogyne brevicauda
45. Uninucleate giant cell is observed in the case
of
a) Rotylenchulus parvus
b) Rotylenchulus borealis
c) Rotylenchulus macrodoratus
d) Rotylenchulus anamictus
46. "Akiochi" disease of rice is associated with
a) Pratylenchus
b) Aphelenchoides
c) Ditylenchus
d) Hirschmanniella
47. Duration of life cycle of Xiphinema index is
a) 21-27 days
b) 4-7 months
c) 1 year
d) 4 years
48. Specific gravity of solution used in
centrifugation floatation for extraction of
nematode is
a) 1.15 - 1.18
b) 1.90 - 1.95
c) 2.0 - 2.1
d) 2.2 - 2.5
49. Phloxine is used to stain
a) Root material
b) Leaf material
c) For determining viability of cyst content
d) To detect nematode within root
50. The enzyme that dissolves middle lamella
causing fluffiness of tissues of the plants
infected with Ditylenchus dipsaci is
a) Amylase
b) Pectinase
c) Carboxylase
d) Dehydrogenase
51. Importance value can be calculated by
a) Relative frequency + relative density +
relative biomass
b) No. of samples containing a species  100/
No. of samples collected
c) Density frequency
d) Density per unit area
52. Which of the following nematode prefers wet
and heavy soils?
a) Hirschmanniella mucronata
b) Meloidogyne exigua
c) Globodera rostochiensis
d) Tylenchorhynchus nudus
53. Which of the following nematode can kill
mosquito?
a) Macroposthonia sp.
b) Romanomermis sp.
c) Helicotylenchus dihystera
d) Haemonchus contortus
54. Which of the following is a fumigant
nematicide?
a) Carbofuran
b) Thimet
c) Metham sodium
d) Phenamiphos
55. The distribution of nematodes in field
generally follows the following frequency
distribution
a) Normal
b) Skewed
c) Negative binomial
d) Aggregated
56. ATP molecules required for synthesis of a
glucose molecule in Calvin-Benson cycle are
a) 12
b) 18
c) 37
d) 38
57. Pathogenicity islands is a term given to
a) Genes in plants complimentary to virulence
genes of pathogens
b) Cluster of heterogenous genes of pathogens
of plants and animals
c) Cluster of highly homologous genes in
microbial pathogens involved in
pathogenicity and virulence of both animals
and plants
d) Cluster of virulence genes in nematodes
which are responsible for nematode feeding
on plants
58. Which of the following nematode occurring in
micro-aerobic habitats in estuarine mud
possess large amount of haemoglobin?
a) Enoplus communis
b) Enoplus brevis
c) Caenorhabditis elegans
d) Rhabditis terrestris
59. The efficiency of aerobic respiration is
a) 8 mol ATP mol-1 glucose
b) 18 mol ATP mol-1 glucose
c) 28 mol ATP mol-1 glucose
d) 38 mol ATP mol-1 glucose
60. Individual pore size of 200 mesh sieve is
a) 750 m
b) 250 m
c) 150 m
d) 75 m
61. Kalahasti malady of groundnut is caused by
a) Meloidogyne arenaria
b) Pratylenchus brachyurus
c) Helicotylenchus dihystera
d) Tylenchorhynchus brevilineatus
62. Relative density of reniform nematode
population in vegetable plot is 75/200 cc soil,
while relative frequency is 64%. Calculate
the prominence value of reniform nematode
a) 6
b) 12
c) 24
d) 48
63. Quantity of water required to prepare 500 ml
F.A 4:10 fixative
a) 350 ml
b) 400 ml
c) 450 ml
d) 460 ml
64. Considering the time scale on evolution of an
organism, nematodes are presumed to have
originated during
a) Jurassic period
b) Cambrian period
c) Oligocene period
d) Devonian period
65. Ventrally lobed oesophagus, position of
vulva equitorial, Didelphic prodelphic coiled
ovary and males not having any caudal alae
refer to the identify of nematode
genus/genera
a) Rotylenchulus
b) Meloidogyne
c) Tylenchulus
d) All of the above
66. Nematode cuticle lacks in
a) Collagen
b) Cuticulins
c) Chitin
d) Mucin
67. Immediately after the Meloidogyne J2
establishes feeding site and increases in
body width
a) Subventral glands increase while dorsal
gland decrease in size
b) Subventral gland decrease while dorsal
gland increase in size
c) Both the glands increase in size
d) Both the glands decrease in size
68. During anhydrobiotic survival of nematodes,
the bound water is replaced by
a) Glycogen
b) Glycerol
c) Galactose
d) Trehalose
69. Survival of Hirschmanniella in flooded
condition is due to the conversion of glucose
to
a) Pyruvic acid
b) Lactic acid
c) Acetic acid
d) Ethanol
70. Maggenti referred the 'bowl skin' bursa as
a) Arakoderan
b) Peloderan
c) Leptodera
d) Boloderan
71. Hemizonions are present
a) 10-15 annules ahead hemizonid
b) 10-15 annules behind hemizonid
c) On the same annule as hemizonid
d) Two annules behind excretory pore
72. During anhydrobiosis when glycerol levels
are low, the bound water is replaced by
a) Inositol
b) Trehalose
c) Maltose
d) Glycogen
73. Heterorhabditis can evade encapsulation in
insects due to the presence of
a) Lipids on the cuticle
b) Mural tooth
c) Photorhabdus
d) Lectins on the cuticle
74. 'Rosette' formation is seen in juveniles of
a) Steinernema
b) Heterorhabditis
c) Ditylenchus
d) Aphelenchoides
75. Excretory system without lateral canals,
consisting of one or rarely two cells is found
in the members of
a) Secernentea
b) Adenophorea
c) Tylenchida
d) Both in Secernentea and Adenophorea
76. Dorsal oesophageal gland duct opening
within the median oesophageal bulb is found
in
a) Neotylenchoidea
b) Tylenchida
c) Aphelenchida
d) Hoplolaimoidea
77. Head with four distinct setae are found in
a) Aphelenchidae
b) Dorylaimidae
c) Tylenchidae
d) Atylenchidae
78. First report of existence of potato cyst
nematode in India infecting potato crops in
Nilgiri Hills in Tamil Nadu was made by
a) Koshy & Swarup
b) Siddiqi & Khan
c) F.G.W. Jones
d) B. Weischer
79. Bursaphelenchus xylophilus is causal
organism of
a) Toppling disease of banana
b) Wilt of pines
c) Red ring disease of coconut
d) White tip of rice
80. Ovary with multiple row of oocytes is found in
a) Hirschmanniella
b) Anguina
c) Criconemoides
d) Rotylenchus
81. Formula “Density Frequency ” calculates
a) Importance value
b) Density per unit volume
c) Prominence value
d) Relative frequency
82. Nemacur is registered trade name of
a) Fenamiphos
b) Aldicarb
c) Ethoprop
d) Oxamyl
83. The paired lateral sensory organs located in
the cephalic region of nematodes are known
as
a) Phasmids
b) Deivids
c) Hemizonids
d) Amphids
84. Hirschmanniella show maximum activity
under
a) High atmosphere humidity
b) Sandy soil
c) High soil moisture
d) Water logging condition
85. Natality is the
a) Time taken in the multiplication of
nematodes
b) Time taken in the emergence of nematodes
from eggs
c) Time taken in infecting the host plant
d) Time taken to complete the life cycle
86. Ditylenchus dipsaci was described by
a) Schacht (1859)
b) Kuhn (1857)
c) Neal (1889)
d) Berkeley (1855)
87. Stippling in the tail tip area in the perineal
pattern is diagnostic character of
a) Meloidogyne javanica
b) Meloidogyne hapla
c) Meloidogyne incognita
d) Meloidogyne arenaria
88. One giant cell is generally produced by
a) Meloidogyne javanica
b) Meloidogyne floridensis
c) Meloidogyne graminicola
d) Meloidogyne mayagenensis
89. Reproduction in cyst forming nematodes is
generally
a) Mitotic parthenogenetic
b) Meiotic parthenogenetic
c) Unisexual
d) Bisexual
90. Corpus in two parts with narrow isthmus and
basal bulb without valve is present in
a) Rhabditoids
b) Tylenchids
c) Diplogasteroids
d) Dorylaimoids
91. Cone tops with Mulvey's bridge is found in
a) Heterodera avenae
b) Heterodera graminis
c) Heterodera trifolii
d) Globodera pallida
92. The stain used to distinguish live from dead
nematode is
a) Crimson red
b) Silver nitrate
c) New blue R
d) Acid-fuchsin
93. Formaldehyde is used a constituent of
fixative of nematodes because it
a) Kills nematodes faster than other chemicals
b) Penetrates in all parts of the body
c) Fixes fats present in the nematodes
d) Preserves protein and glycogen and work as
hardening reagent
94. Baermann funnel technique is best used for
a) Isolation of nematodes from soil samples
b) Isolation of cysts of nematodes from soil
samples
c) Removing soil particles from nematode
suspension
d) Separating large size nematodes from small
size nematodes
95. Stylet knobs are virtually absent in
a) Tylenchorhynchus
b) Radopholus
c) Aphelenchus
d) Criconemella
96. Female body saccate, sausage or kidney
shape, vulva sub-median large with
protuberant vulval lips are present in
a) Verutus
b) Sarisodera
c) Atalodera
d) Punctodera
97. Hirsutella rhossiliensis has shown the ability
to
a) Suppress nematode density
b) Increase nematode density
c) Completely eliminate the nematodes
d) Rear the nematodes for their culturing
98. Which of the following genera is cyst forming
nematode?
a) Atalodera
b) Cactodera
c) Sarisodera
d) Cryptodera
99. A paratenic host is one in which a
a) Parasite is carried on its body
b) Parasite survives without undergoing further
development
c) Parasite reaches maturity and reproduces
d) Parasite reaches maturity but does not
reproduce
100. The permeability characteristics of the
nematode eggshell are derived mainly from
the
a) Lipid layer
b) Chitinous eggshell
c) Lectin residues
d) Bi-polar proteins
101. The following pigment is characteristic of
nematode senescence
a) Acidfuschin
b) Lipofuscin
c) Oxytocin
d) Nematicidin
102. In an ecosystem, nematodes function as
a) Primary decomposers
b) Secondary decomposers
c) Tertiary decomposers
d) Do not decompose
103. Clavibacter toxicus is carried by Anguina
funesta attached to
a) Stylet
b) Inner walls of esophagus
c) Cuticle
d) Inner walls of intestine
104. Macroposthonia xenoplax can be
differentiated from Hemicriconemoides
mangiferae on the basis of
a) Size of stylet
b) Cuticular sheath
c) No. of ovaries
d) Annulations
105. Which of the following chemicals can induce
hatching of several cyst nematode species?
a) Ethyl-propyl ester
b) Flavianic acid
c) Aspartic acid
d) Asparagusic acid
106. Sphingomyelin is a
a) Polypeptide in ribosomes of nematodes
b) A phospholipid constituting cellular
membranes
c) A chemical inhibiting hatching of Heterodera
glycines
d) A plant derived hatching stimulant for
Heterodera goettingiana
107. In aerobic conditions, fatty acids are broken
down to Acetyl-Co-A, NADH and reduced
flavoprotein by
a) -oxydation
b) Carboxylic substitution
c) Hexose monophosphate shunt
d) Decarboxylation reactions
108. The major energy reserve in plant parasitic
nematode is
a) Lipids
b) Carbohydrates
c) Proteins
d) Triacylglycerols
109. "Potato race, tulip race, onion race and
daffodil race" refer to this nematode
a) Rot nematode
b) Stem and bulb nematode
c) Foliar nematode
d) Cyst nematode
110. The size of 325 mesh sieve is
a) 35 m
b) 45 m
c) 55 m
d) 60 m
111. Which group of nematode has the median
bulb occupying the entire body width?
a) Dorylaimida
b) Aphelenchida
c) Rhabditida
d) Tylenchida
112. Which Pasteuria species is parasitic on
lesion nematodes?
a) Pasteuria penetrans
b) Pasteuria thornei
c) Pasteuria nishizawae
d) Pasteuria ramosa
113. Tobacco ring spot virus is transmitted by
a) Xiphinema brevicolle
b) Xiphinema index
c) Xiphinema americanum
d) Xiphinema diversicaudatum
114. In USA, the following nematode has been
subjected to Federal quarantine since 1954
a) Heterodera glycines
b) Globodera pallida
c) Meloidogyne incognita
d) Tylenchulus semipenetrans
115. Anchor shaped stylet knob is present in
a) Longidorus
b) Xiphinema
c) Hoplolaimus
d) Criconematids
116. All the three oesophageal glands open into
median bulb in
a) Tylenchids
b) Aphelenchids
c) Heteroderids
d) Rhabditis
117. Oesophageal glands overlap the dorsal side
of the intestine
a) Hoplolaimus and Radopholus
b) Radopholus and Hirschmanniella
c) Hoplolaimus and Pratylenchus
d) None of the above
118. Circum oesophageal commissure is part of
a) Nervous system
b) Digestive system
c) Circulatory system
d) None of the above
119. In Tylenchida the nerve ring encircles the
middle part of
a) Intestine
b) Oesophagus
c) Pharynx
d) None of the above
120. The metabolic product of carbofuran is
a) Carbofuran anide
b) Carbofuran phenol
c) Carbofuran sulfone
d) Carbofuran phosphate
121. A nematode which is not known to be seedborne
is
a) Ditylenchus dipsaci (Onion and Lucerne)
b) Aphelenchoides besseyi (Rice)
c) Anguina tritici (Wheat)
d) Aphelenchus avenae
122. The following nematicide exhibits
irreversible binding of acetyl cholinesterase
a) Oxamyl
b) Fenuslfothion
c) Phorate
d) Phenamiphos
123. Most nematicides kill nematodes by
affecting respiration through
a) Affecting enzymes
b) Denaturing organs
c) Blocking cytochromes
d) Imbalancing CO2
124. Royal 300 strain – Antipolis is commercial
product of this bioagent
a) Arthrobotrytis superba
b) Arthrobotrytis irregularis
c) Arthrobotrytis robusta
d) Arthrobotrytis oligospora
125. According to de Man formula 'P' refers to
a) Position of amphid
b) Position of phasmid
c) Position of cardia
d) Position of nerve ring
126. Pasteuria infection in root-knot nematode
occurs through
a) Zoospores
b) Oospores
c) Ascospores
d) Endospores
127. Hisar Lalit is a resistant cultivar of
a) Brinjal
b) Tomato
c) Cowpea
d) Okra
128. Which species of Anguina produce floral
galls that are toxic to animals?
a) Anguina tritici
b) Anguina mobilis
c) Anguina agrostis
d) Anguina pustulicola
129. In 'Nematode wool', which stage of
nematode undergoes anhydrobiosis?
a) Second stage
b) Pre-adult
c) Adults
d) Third-stage


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