Strategies for enhancement in food production Test-8 March 18, 2018admin0 Comments CategoriesNEET-Botany-Strategies for enhancement in food production Strategies for enhancement in food production Test-8 1. Correct match of the following is Shoot tip culture – Production of virus infected plants Somaclonal variations – Variations due to gene recombinations Synthesis seeds – embryoids covered with agar Micro propagtion – propagation of orchids in large number 2. Which of the following cannot be obtained on basal medium ? Plantlets from mature embryo Seeding from seed Plantlets from callus Callus from explant 3. The somatic embryos with one set of chromosomes can be obtained through Embryo culture Endosperm culture Shoot tip culture Pollen grain culture 4. In virus – infected plants the meristematic tissue both apical and axillary buds are free of virus because: the dividing cells are virus resistant meristems have anti viral compounds the cell division of meristems are faster than the rate of viral multiplication viruses cannot multiply within meristem cell(s) 5. To isolate protoplast, one needs : pectinase cellulase both pectinase and cellulase chintinase 6. In virus-infected plants the meristematic tissues in both apical and axillary buds are free of virus I because: the dividing cells are virus resistant meristems have anti viral compounds the cell division of meristems are faster than the rate of viral multiplication Viruses cannot multiply within meristem cell(s) 7. Given below are a few statements regarding somatic hybridization. Choose the correct statements. i) protoplasts of different cells of the same plant are fused ii) protoplasts from cells of different species can be fused iii) treatment of cells with cellulase and pectinase is mandatory iv) the hybrid protoplast contains characters of only one parental protoplast. (ii)and(iii) (i)and(ii) (iii) and (ii) (ii) and (iii) 8. To isolate protoplast, one needs: pectinase both pectinase and cellulase cellulase chitinase 9. Select the right features related to emasculationI) It is done in male parent II) It is done in female parent III) It is done in both the parents IV) It prevents cross pollination V) It prevents self pollination I and IV III and IV I and IV II and V 10. Scientific knowledge and field techniques are necessary to carryoutI) Clonal selection II) Pureline selection III) Hybridization IV) Mass selection I&II II & IV II & III I & IV 11. No change in the genotype of the varieties is observed in the following crop improvement methodsI) Pureline selection II) Mass selection III) Clonal selection IV) Introduction I and IV II and III I and III III and IV 12. During hybridization procedure, bagging is necessary forI) Emasculated flowers II) Flowers of male parentIII) Male sterile flowers of female parentIV) Flowers of female parent with dioecious conditioin Only I is correct Only I & II are correct I, III & IV are correct I, II & III are correct 13. Emasculation is not necessary inI) Plant with male sterile bisexual flowers II) Plant with bisexual flowers used as male parentIII) Plant with unisexual pistillate flowersIV) Plant with bisexual flowers used as female parent I and IV III and IV II and IV I, II and III 14. Arrange the following steps of hybridization procedure in a sequenceI) Artificial cross pollinationII) Selection of parentsIII) BaggingIV) Emasculation III, I, II, IV II, IV, III, I IV, II, I, III II,I,IV,III 15. Identify the correct sequence of events in relation to the procedure of hybridization. A) BaggingB) Tagging C) Emasculation D) Collection of pollenE) Selfing of parents A, C, B, D, E E, A, C, B, D C, A, D, E, B E, C, A, D, B Loading … Related posts: Strategies for enhancement in food production Test-4 Strategies for enhancement in food production Test-5 Strategies for enhancement in food production Test-6 Strategies for enhancement in food production Test-7 Strategies for enhancement in food production Test-9 Powered by YARPP.