a) emasculation
b) male sterile line
c) artificial pollination
d) selective or differential reproduction
2) A technique of micropropagation is
a) multiple shoot production
b) multiple shoot production & embryo rescue
c) growth of micro-organisms on culture medium
d) somatic embryo genesis
3) Green Revolution in India was possible due to
a) better irrigation, fertilizers and pes ticide facilities
b) exploitation of high yielding varieties
c) intensive cultivation
d) all of the above
4) An under- utilized plant which grows in deserts of Mexico and commonly called ‘hohoba’ is
a) Psophocarpus tetragonolobus
b) Simmondsia chinensis
c) Leucaena leucocephala
d) Parthenium argentatum
5) Uncontrolled plant introduction in India has resulted in introduction of disease
a) flag smut of wheat
b) late blight of potato
c) leaf rust of coffee
d) all of these
6) Which of the following fruits in India is the result of plant introduction and acclimazation ?
a) guava & loquat
b) grapes & papaya
c) litchi & chiku
d) all of these
7) Haploid plants are preferred over diploids for mutation study because in haploids
a) recessive mutation express immediately
b) induction of mutation is easier
c) culturing is easier
d) dominant mutation express immediately
8) The reason for vegetatively reproducing crop plants to suit for maintaining hybrid vigour is that
a) They are more resistant to diseases
b) once a desired hybrid produced, no chances of losing it
c) They can be easily propagated
d) they have a longer life span
9) Which of the following crops have been brought to India from new world ?
a) cashew nut, potato, rubber
b) mango, tea
c) tea, rubber, mango
d) coffee
10) Haploids are more suitable for mutation studies than the diploids. This is because
a) haploids are more abundant in nature than diploids
b) all mutations, whether dominant or recessive are expressed in haploids
c) haploids are reproductively more stable than diploids
d) mutagens penetrate in haploids more effectively than in diploids
11) A scientist wants to study the viral effect on plants. Which of the following part of the plant should be excluded ?
a) phloem
b) pith
c) cortex
d) shoot apex
12) In high yielding hybrid crop varieties to exploit hybrid vigour, the farmers need to purchase fresh hybrid seed every year, because
a) it is cheaper to purchase fresh seed
b) hybrid vigour is lost due to inbreeding depression
c) they are not allowed to grow their own seed
d) government has accepted Dunkels proposals
13) Somatic hybridization is a technique of
a) natural breeding
b) natural pollination
c) artificial pollination
d) somatic cells hybridization
14) IR-8 is a variety of
a) Cajanus
b) rice
c) ground nut
d) maize
15) The theory of centers of origin of crops was given by
a) N.I Vavilov
b) M.S.Swaminathan
c) Norman Borlaug
d) Gurudev S.Khush
16) Totipotency means
a) flowering in a culture medium
b) development of fruit from a flower in a culture
c) development of an organ from a cell in culture medium
d) all of the above
17) Father of green revolution in India is
a) M.S.Swaminathan
b) N.Borlaug
c) Mishra
d) P.Maheswari
18) Simmondsia chinensis is an oil yielding plant of Mexico and it has been recently introduced in India deserts. What is the common name of this plant?
a) subabul
b) guayule
c) winged bean
d) jojoba
19) Intergeneric crosses are rarely successful under natural condition. Which of the following methods may be beneficial in this regard ?
a) embryo culture
b) tissue culture
c) anther culture
d) protoplast culture
20) In tissue culture of parenchyma, mitosis are accelerated in the presence of
a) auxin only
b) cytokinin only
c) auxin; cytokinin
d) gibberellins & auxin
21) International Rice Research Institute (IRRI) is located in
a) Japan
b) Philippines
c) Mexico
d) India
22) The greatest threat to genetic diversity in agriculturalcrop is
a) introduction of high yielding varieties
b) extensive use of fertilizers
c) extensive use of insecticides
d) extensive mixed cropping
23) Pollen grains of a plant whose 2n=28 are cultured to get callus by tissue culture method. What would be the number of chromosomes in the cells of the callus?
a) 14
b) 56
c) 28
d) 21
24) The technique of obtaining large number of plantlets by tissue culture method is called
a) plantlet culture
b) organ culture
c) micropropagation
d) macropropagation
25) In protoplast fusion the enzymes required is/are
a) cellulose, hemicellulase, pectinase
b) pectinase
c) ligase, hemicellulase
d) hemicellulase
26) Out of the following which two methods of propagation yield plants with identical genetic constitution?
i) cutting
ii) seed production
iii) mutations
iv) tissue cultures
a) I & ii
b) I & iii
c) I & iv
d) ii & iv
27) Which of the following is not paired correctly ?
a) winged bean-wood used for timber purposes
b) jojoba-seeds yields liquid wax
c) guayule-yields latex, which can be converted to rubber
d) Leucaena-wood is a source of timber, paper pulp & rayon
28) The method of selection applicable to self pollinated crops is
a) mass selection
b) natural selection
c) clonal selection
d) pure line selection
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