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Quiz 4
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Q.1
From which technique, new and better varieties of crop plants are formed ... [ W.B. 2009]
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a) Selection
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b) Hybridization
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c) Grafting
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d) Hybridization followed by selection
Explanation
Breeding is carried out by the conventional breeding techniques (described earlier) or by mutation breeding. The conventional method of breeding for disease resistance is that of hybridisation and selection. Answer : (d)
Q.2
In biogas plant which group of bacteria is found ... [ CET Chd 2010]
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a) Archaebacteria
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b) Mycobacteria
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c) Myxobacteria
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d) Cyanobacteria
Explanation
The bacteria which produce the gaseous mixture (biogas) are collectively known as methanogens. Methanobacterium is one such methanogen. Methanogens are microorganisms that produce methane as a metabolic byproduct in hypoxic conditions. They are prokaryotic and belong to the domain Archaea. Answer : (a)
Q.3
Which one is used in biogas generation? [ Wardha 2002]
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a) Rhizobium
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b) Methanobacterium
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c) Agrobacterium
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d) Azotobacter
Explanation
The bacteria which produce the gaseous mixture (biogas) are collectively known as methanogens. Methanobacterium is one such methanogen. Answer : (b)
Q.4
Nagpuri buffalo is ... [ KCET 1997]
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a) Milker
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b) Grazer
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c) Dual purpose
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d) Draught cattle
Explanation
The Nagpuri is a breed of water buffalo originating in Maharashtra, India. It stands better amongst the breeds of buffaloes which combine the milk and drought qualities in a better proportion in adverse climatic conditions Average milk yield per lactation is 1039 kg ranging from 760-1500 kg with average milk fat of 8.25% ranging from 7.0-8.8%. Nagpuri can withstand extreme climatic conditions as high as 47°C even in respect of milk production and fertility.Male animal are used for daught purposes but it works slow than bull Cattle). Answer : (c)
Q.5
Clonal cell lines are got from ... [ MPPMT 2000]
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a) Tissue culture
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b) Tissue system
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c) Tissue homogenization
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d) Tissue fractionation
Explanation
Clonal cell lines are the cells that are identical to each other and share a common ancestor. Cell lines are cultures of animal cells that can be propagated repeatedly and sometimes indefinitely. They arise from primary tissue cultures. Answer : (a)
Q.6
One of the following is surface feeder ... [ MHT CET 2010]
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a) Mrigal
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b) Hag fish
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c) Catla
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d) Dolphin
Explanation
Surface feeder fish are those fish which have a straight back that helps their upturned mouth or supra terminal mouth to easily reach the surface and perfectly grab the food without being revealed to the prey. Examples of surface sardine, herring, bluefin tuna, catla and most sharks. Answer : (c)
Q.7
Hormone used for inducing lactation in sterile cows is ... [ Har. PMT 2000]
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a) Relaxin
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b) Estrogen
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c) Stilbestrol
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d) Progesterone
Explanation
Stilbesterol is the hormone which is used in sterile cows to induce lactation. It is a synthetic nonsteroid with the properties of estrogen. Answer : (c)
Q.8
Inherent capacity of a cell to regenerate the whole organism is called ... [ Kerala 2003]
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a) Totipotency
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b) Proliferation
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c) Phylogeny
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d) Differentiation
Explanation
Totipotency is defined as the ability of a single cell to divide and produce all the differentiated cells in an organism, including extraembryonic tissues. Answer : (a)
Q.9
Blue revolution is ... [ HPPMT 2012]
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a) Increased beef production
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b) Increased grain production
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c) Increased exploitation of aquatic product
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d) Increased milk production
Explanation
The Blue Revolution refers to the significant growth and intensification of global aquaculture production -domestication and farming of fish, shellfish, and aquatic plants- from the middle of the 20th century to present, particularly in underdeveloped countries. Answer : (c)
Q.10
Plant medium used widely in preparation of culture medium is got from ... [ AIIMS 1998]
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a) Pinus roxburghii
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b) Cocos nucifera
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c) Cycas revoluta
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d) Borassus flabellifer
Explanation
Plant medium used widely in the preparation of culture medium is got from Cocos nucifera milk of coconut or coconut water is widely used for culture preparation as it contains several growth substances and can be extracted easily. It provides the growth hormone known as cytokinin. Answer : (b)
Q.11
Chick Pea is being grown in area where bacterial blight is common. What measures (a - d) should be taken .... [ CBSE 2008] a) Spraying Bordeaux mixture b) Controlling insect or vector of pathogen c) Use disease free seeds d) Use seeds of disease resistant variety
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a) a, b
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b) b, c
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c) c, d
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d) a, d
Explanation
Bacterial blight is caused by Pseudomonas syringae. Bordeaux mixture—a combination of copper sulfate, lime, and water—is an effective fungicide and bactericide. This can protect chickpea. Using disease variant seeds are also another measure to prevent from bacterial blight. Answer : (d)
Q.12
Pick up the wrong statement ... ... [ kerala 2008]
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a) Pectinase and cellulase dissolve cell wall
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b) Some cyanobacteria from symbiotic association with fern Azolla
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c) Regeneration of cell wall in somatic hybridisation is induced by PEG
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d) Plants obtained through pollen culture are always haploid
Explanation
Cellulase catalyze cellulolysis, the decomposition of cellulose and of some related polysaccharides. Pectinase break down pectin. Cell wall is made of cellulose, pectin. Statement (a) is correct. Azolla is a small floating fern and is the only known pteridophyte that lives in symbiosis with a diazotrophic cyanobacterium. Statement (b) is correct. PEG is used in protoplast fusion and not for regeneration of cell wall in somatic hybridization. Statement (c) is wrong. Anther or pollen culture: It is a technique by which immature pollen is made to divide and grow into tissue (either callus or embryonic tissue), primarily to produce haploids. Statement (d) is correct. Answer : (c)
Q.13
Ranikhet disease is connected with .... [ MPPMT 1995]
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a) Fishes
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b) Pigs
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c) Hens
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d) Honey bee
Explanation
Ranikhet disease, also known in the West as Newcastle disease is a contagious and highly fatal disease of fowls. It is one of the most serious virus diseases of poultry. Answer : (c)
Q.14
Plant piece used in tissue culture is called ... [ WB 2011]
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a) Explant
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b) Clone
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c) Somaclone
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d) Inoculant
Explanation
Explant is a cell, organ, or piece of tissue which has been transferred from animals or plants to a nutrient medium. In terms of plants, the explant is the small pieces of plant part and issues that are aseptically cut and then they are kept in a nutrient medium. Answer : (a)
Q.15
If more than single species of fish is cultured at a time, then it is called ... [ Manipal 2004]
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a) Monoculture
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b) Aquaculture
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c) Polyculture
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d) Mori culture
Explanation
Polyculture is the practice of culturing more than one species of aquatic organism in the same pond. Moriculture can be defined as the process of cultivating mulberry plants in order to obtain feed for silkworms. Aquaculture, also known as aquafarming, is the controlled cultivation of aquatic organisms such as fish, crustaceans, mollusks, algae and other organisms of value such as aquatic plants. Answer : (c)
Q.16
Find correct match ... [ EAMCET 2009]
I
II
a) Use of bisexual flowers as female flower
i. Clonal selection
b) Incorporation of several desirable characters into a single variety
ii. Pure line selection
c) Exploiting hybrid vigour for several generations
iii. Emasculation
d) Improving local varieties of self pollinated plants
iv. Hybridization
- - - -
v. Polyploidy breeding
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a) a - iv, b - v, c - iii, d - i
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b) a - ii, b - iii, c - iv, d - v
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c) a - iii, b - iv, c - i, d - ii
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d) a - i, b - v, c - ii, d - iv
Explanation
Emasculation is the process of removal of anthers in bisexual flowers to prevent self-pollination. a-iii. Plant hybridization is the process of crossbreeding between genetically dissimilar parents to produce a hybrid. b- iv Clonal selection is the selection of the most desirable members of a clone for continued vegetative propagation rather than for sexual reproduction. Hybrid vigour can be maintained for long periods by clonal selection because clones are stable and are not prone to segregation. c- i. In pureline selection, a large number of plants are selected from a self-pollinated Crop and are harvested individually, their individual progenies are evaluated and the best progeny is released as a pureline variety.d - ii Answer : (c)
Q.17
Somaclonal variations are the ones ... [ BHU 1994]
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a) Caused by mutagens
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b) Produced during tissue cultures
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c) Induced during sexual embryogeny
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d) Caused by gamma rays
Explanation
Somaclonal variation is the variation seen in plants that have been produced by plant tissue culture. Answer : (b)
Q.18
Somatic embryo developed in tissue culture from ... [ JKCMEE 2011]
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a) Somatic cell
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b) Single germline cell
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c) Any fertilized cell
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d) Anther
Explanation
Somatic embryos are non-zygotic embryo- like structure or embryoids which develop from somatic cells. Its regeneration requires a high concentration of a single hormone, auxin like 2,4−D. Generally, cytokinin is not required except for certain monocot plants. Answer : (a)
Q.19
Virus free plants can be obtained by ... .. [ AIIMS 1996]
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a) Root tip culture
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b) Antibiotic treatment
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c) Shoot tip culture
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d) Root tip culture
Explanation
Answer : (c)
Q.20
A totipotent cell means ... [ JIPMER 2003]
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a) An undifferentiated cell capable of developing into a system or entire plant
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b) An undifferentiated cell capable of developing into organ
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c) An undifferentiated cell capable of developing into complete embryo
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d) Cell which lacks the capability to differentiate into an organ or system
Explanation
A totipotent cell is a single cell that can give rise to a new organism. Spores and zygotes are examples of totipotent cells Answer : (a)
Q.21
Fish flour is rich in ... [ MHTCET 2009]
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a) Fat
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b) Protein
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c) Vitamins
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d) Minerals
Explanation
Fish flour contains Crude protein : 65% Crude fat : 9.2% Ash : 16.8% Answer : (b)
Q.22
Somaclonal variations are the ones ,,, [ BHU 1994]
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a) Caused by mutagens
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b) Produced during tissue culture
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c) Induced during sexual embryogeny
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d) Caused by gamma ray
Explanation
Somaclonal variation is the variation seen in plants that have been produced by plant tissue culture Somaclonal variation can be defined as the variation that occurs because of genetic mutation caused by in vitro conditions or by chimeral separation Answer : (b)
Q.23
A disease of poultry is ... [ KCET 2004
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a) Anthrax
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b) Ranikhet
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c) Foot and mouth
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d) Pebrine
Explanation
Answer : (b)
Q.24
Spawning in fishes is induced by injecting the female with .... [ WB 2011]
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a) FSH and LH
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b) Estrogen
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c) Prostaglandins
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d) Progesterone
Explanation
FSH, LH and hCG are heterodimeric proteins Ovulation and spawning were induced in the breeding season by injecting human chorionic gonadotrophin (hCG) and/or a preparation of the pituitary gland from common carp (CPG). Answer : (a)
Q.25
Totipotency is basic principle of ... [ ODisha 2012]
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a) Tissue culture
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b) Silviculture
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c) Sericulture
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d) Pisciculture
Explanation
Answer : (a)
Q.26
A milch breed of cow is ...
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a) Hallikar
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b) Sindhi
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c) Amritmahal
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d) Surti
Explanation
Answer : (b)
Q.27
Which will vanish in the absence of human help ... [ CPMT 1999]
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a) Rice
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b) Potato
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c) Maize
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d) Potato
Explanation
Answer : (c)
Q.28
In protoplast fusion, the enzymes required are ... [ Odisha 2008]
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a) Hemicellulase
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b) Pectinase
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c) Cellulase, hemicellulase, pectinase
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d) Ligase, hemicellulase
Explanation
Answer : (c)
Q.29
In which nematode infection is observed ... [ Guj CET 2006]
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a) Leaves
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b) Flowers
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c) Root
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d) Stem
Explanation
Answer : (c)
Q.30
Somatic hybridizations is carried out by ... [ manipal 2005]
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a) Pollen culture
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b) Cell culture
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c) Protoplast fusion
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d) Haploid culture
Explanation
Answer : (c)
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