Practice Test


Q1) Embryo rescue for successful hybridisation in interspecific crosses can be achieved by: Show Answer


Q2) Somaclonal variations are those which appear during: Show Answer


Q3) One of the recent methods of crop improvement is the protoplast technology. The protoplast of two different varieties can be made to fuse with the help of: Show Answer


Q4) Orthodox seeds are those: Show Answer


Q5) Why is a shoot tip culture preferred for international exchange of germplasm? Show Answer


Q6) Cryopreservation is: Show Answer


Q7) Seeds that are killed by drying and freezing temperature are termed: Show Answer


Q8) Crops with recalcitrant seeds include: Show Answer


Q9) Why haploids are preferred of their use in breeding programmes? Show Answer


Q10) Genetic material, especially that contained within the reproductive cell is called: Show Answer


Q11) The most convenient way to maintain plant germplasm is: Show Answer


Q12) Triticale is man-made cereal obtained through hybridisation between: Show Answer


Q13) Plants with similar genotypes are: Show Answer


Q14) Aim of plant breeding is to: Show Answer


Q15) Pure line breeds refer to: Show Answer


Q16) Sharbati Sonora variety of wheat was obtained by: Show Answer


Q17) Somatic hybrids are useful in introducing genes for: Show Answer


Q18) Plasmids of which organism are frequently used in the production of transgenic plants? Show Answer


Q19) Genetic transformation is possible through: Show Answer


Q20) Hybridisation through protoplast fusion is called: Show Answer


Q21) Four inbred lines of wheat are crossed. The cross is called: Show Answer


Q22) Scientists are trying to get hybridisation between tomato and potato. The most accurate name would be: Show Answer


Q23) Which one of the following crops was subjected the most to continuous selection and domestication by man? Show Answer


Q24) Desired improved varieties of economically useful crops are raised by: Show Answer


Q25) How are seeds in a gene bank stored? Show Answer


Q26) What are transgenic plants? Show Answer


Q27) Improved varieties of wheat suitable for Indian climate have been developed by: Show Answer


Q28) Which of the following is not used for crop improvement? Show Answer


Q29) Heterosis is: Show Answer


Q30) Inbreeding is possible between two members of: Show Answer


Q31) Polyploidy is often the result of: Show Answer


Q32) Among the following which one is the best chemical for inducing the polyploidy? Show Answer


Q33) At cryopreservation of germplasm the biological activity: Show Answer


Q34) What is triticale? Show Answer


Q35) Improved rice variety IR-8 has been introduced in India from: Show Answer


Q36) What is gene bank? Show Answer


Q37) The dwarfing gene Dee-geo-woo-gen is found in: Show Answer


Q38) Norin-10 gene from Japan is a: Show Answer


Q39) Who among the following is known as father of Green revolution? Show Answer


Q40) PUSA is a variety of: Show Answer


Q41) Sharbati Sonora is an example of: Show Answer


Q42) Most cultivated plants of world today are examples of: Show Answer


Q43) Polyploidy results in: Show Answer


Q44) Taichung is a dwarf variety of rice. Its original home is: Show Answer


Q45) Method of selection in vegetatively propagated plants is: Show Answer


Q46) Hybrid vigour is due to: Show Answer


Q47) Sonora and Lerma Rojo are varieties of: Show Answer


Q48) Potato and apples are multiplied by: Show Answer


Q49) Aneuploidy is commonly observed in different varieties of: Show Answer


Q50) N. J. Borlaug was awarded Nobel prize for his work on wheat breeding. He received this prize in the branch of: Show Answer


Q51) Banana is generally seedless because it is: Show Answer


Q52) Triploid are said to more useful than other polyploids because these are: Show Answer


Q53) Triticum durum was possible fertilised by a wild grass which is thought to have given rise to: Show Answer


Q54) Triticale has been developed through intergeneric hybridisation between: Show Answer


Q55) Green revolution refers to: Show Answer


Q56) Dwarf wheat varieties were evolved by: Show Answer


Q57) Technique used in agriculture biotechnology is: Show Answer


Q58) Important use of agriculture biotechnology is to: Show Answer


Q59) Dwarf wheat varieties brought into India from Mexico were: Show Answer


Q60) Credit for bringing green revolution to India goes to: Show Answer


Q61) IR-36 was developed at IRRI by Gurdev S. Khush through breeding of: Show Answer


Q62) Pomato involves the plants: Show Answer


Q63) In India the state famous for peanut cultivation is: Show Answer


Q64) In crop improvement programme haploids are of considerable importance because they: Show Answer


Q65) A major application of embryo culture is in: Show Answer


Q66) Dr. M. S. Swaminathan could produce an amber seeded high yielding wheat variety called 'Sharbati sonora' from Mexican dwarf variety by using: Show Answer


Q67) The hexaploid wheat is obtained by: Show Answer


Q68) If an angiospermic male plant is diploid and female plant tetraploid, the ploidy level of endosperm will be: Show Answer


Q69) Scientist associated with cloning of sheep: Show Answer


Q70) The bacterial disease, which is found in chickens is: Show Answer


Q71) A cybrid is a hybrid carrying: Show Answer


Q72) India's wheat yield revolution in the 1960s was possible primarily due to: Show Answer


Q73) Three crops that contribute maximum to grow grain production are: Show Answer


Q74) Golden rice is a transgenic crop of the future with the following improved trait: Show Answer


Q75) An important step in the manufacture of pulp for paper industry from the woody tissues of plants is the: Show Answer


Q76) Which of the following is generally used for induced mutagenesis in crop plants? Show Answer


Q77) One of the most important functions of botanical gardens is that: Show Answer


Q78) Genetic diversity in agricultural crops is threatened by: Show Answer


Q79) One of the ex situ conservation methods for endangered species is: Show Answer


Q80) All forms of life should be conserved because: Show Answer


Q81) Triticale, the first man-made cereal crop, has been obtained by crossing wheat with: Show Answer


Q82) Crop plants grown in monoculture are: Show Answer


Q83) Farmers in a particluar region were concerned that premature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield? Show Answer


Q84) Golden rice is a promising transgenic crop. When released for cultivation, it will help in: Show Answer


Q85) In the hexaploid wheat, the haploid (n) and basic (x) numbers of chromosomes are: Show Answer


Q86) Which of the following is/are important in the development of phenotype? Show Answer


Q87) HUW 486 variety obtained through hybridisation is an improved variety of which plant? Show Answer


Q88) In plant breeding which of the following is involved in creation of genetic variation? Show Answer


Q89) In India which organisation is involved in evaluation and release of improved varieties of plants? Show Answer


Q90) Germplasm is sum total of all alleles of the genes present in crop and its related species. The germplasm of any crop species would consist of which type of materials? Show Answer


Q91) Loss of vigour associated with inbreeding is termed: Show Answer


Q92) Late blight of potato is caused by: Show Answer


Q93) In cross breeding of animals, the progeny will be similar to selected breeds in how many generations? Show Answer


Q94) A hybrid variety of rice having long and scented grain is: Show Answer


Q95) A contagious disease called anthrax affects cattle, buffaloes, horse, sheep and goats is caused by: Show Answer


Q96) Which of the following is disease of cattle? Show Answer


Q97) Which of the following is most commonly used for creation of genetic variation? Show Answer


Q98) Which of the following is the consequence of plant disease? Show Answer


Q99) Production of which of the following involves the use of colchicine: Show Answer


Q100) Viruses enter into their host through which of the following? Show Answer


Q101) Which of the following is not correct about plant? Show Answer


Q102) Which of the following animal diseases is caused by a virus? Show Answer


Q103) Mule is produced by which of the following? Show Answer


Q104) Which of the following plant diseases cannot be controlled by chemical treatment? Show Answer


Q105) Hybrids are produced by crossing inbreds in which of the following? Show Answer


Q106) In the following table identify the correct the correct matching of the crop, its disease and the corresponding pathogen.
Crop : Disease : Pathogen. Show Answer


Q107) Maximum genetic variation can be created through Show Answer


Q108) The process of cultivating and bringing about certain changes in the wild forms so that they yield better, under artificial growing conditions is called Show Answer


Q109) Culture of isolated microspores results in the formation of Show Answer


Q110) Disease free plants are obtained from Show Answer


Q111) Haploids are considered better genetic stock because they Show Answer


Q112) Germplasm also preserve rare genotype for Show Answer


Q113) Autopolyploidy can be induced artificially by Show Answer


Q114) The application of induced mutations for crop improvement is called Show Answer


Q115) What was the source of first induced mutations? Show Answer


Q116) 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? Show Answer


Q117) Mutations is red grained Sonara 64 variety of wheat resulted in the amber grain colour mutant Show Answer


Q118) Protection of genetic resources is called Show Answer


Q119) Correct chronological order of the events occurring during callus culture is Show Answer


Q120) Choose the correct answer Show Answer


Q121) Hybrid vigour is eroded through Show Answer


Q122) Wild varieties of plants must be conserved to Show Answer


Q123) Electrofusion or chemofusion is used for Show Answer


Q124) The loss of genes from a gene pool is called Show Answer


Q125) The enzyme used for isolation of single cells from explant is Show Answer


Q126) A hybrid where cytoplasm of two parent cells are fused by retaining only one parental nucleus is called Show Answer


Q127) Haploids are more suitable for mutation studies than diploids. This is because Show Answer


Q128) Somatic hybridization is accomplished by Show Answer


Q129) Constraints of conventional breeding are Show Answer


Q130) New methods of obtaining plant breeds includes Show Answer


Q131) Mutational breeding has produced the variety of mung bean which is resistance to Show Answer