MCQ Questions for Class 12 Biology: Ch 9 Strategies for Enhancement in Food Production
1. Norman Borlaug the “father of green Revolution” has developed highly recognized and appreciated cultivating variety of___________.
(a) Sugarcane
(b) Rice
(c) Onion
(d) Wheat
► (d) Wheat
2. In maize, hybrid vigour is exploited by
(a) crossing of two inbred parental lines
(b) harvesting seeds from the most productive plants
(c) inducing mutations
(d) bombarding the seeds with DNA
► (a) crossing of two inbred parental lines
3. Gene banks comprise
(a) Seed banks and cryopreservation
(b) Seed banks, orchards, tissue culture and cryopreservation
(c) Tissue culture and cryopreservation
(d) Seed banks, tissue culture, and cryopreservation
► (b) Seed banks, orchards, tissue culture and cryopreservation
4. The technique of fusion of the protoplasts from two different plant varieties is called?
(a) Cloning
(b) Micro propagation
(c) Soma clones
(d) Somatic Hybridisation
► (d) Somatic Hybridisation
5. What is antisense technology?
(a) A cell displaying a foreign antigen used for synthesis of antigens
(b) Production of somaclonal variants in tissue cultures
(c) When a piece of RNA that is complementary in sequence is used to stop expression of a specific gene
(d) RNA polymerase producing DNA
► (c) When a piece of RNA that is complementary in sequence is used to stop expression of a specific gene
6. An organism used as bio-fertilizer for raising soybean crop is____________.
(a) Rhizobium
(b) Azospirillum
(c) Azotobacter
(d) Nostoc
► (a) Rhizobium
7. Microorganism used as biopesticides is
(a) Fungi
(b) Protozoa
(c) Bacteria
(d) All of the above
► (d) All of the above
8. Modification and adjustment of an organism to local environment is called?
(a) Selection
(b) Introduction
(c) Quarantine
(d) Acclimatization
► (d) Acclimatization
9. Breeding crops with higher levels of vitamins and minerals or higher protein and healthier fats is called?
(a) Single cell protein
(b) Tissue culture
(c) Gametogenesis
(d) Bio-fortification
► (d) Bio-fortification
10. Procedure between formation of plantlets in culture and establishment of seedlings in the field is called?
(a) Regeneration
(b) Somatic transfer
(c) Transgene
(d) Hardening
► (d) Hardening
11. To meet the demands of society, the in vitro production of a large number of plantlets in a short duration practised in the floriculture and horticulture industry is called
(a) Hybridoma technology
(b) Somatic hybridisation
(c) Micropropagation
(d) Somaclonal variation
► (c) Micropropagation
12. Inbreeding is necessary if you want to evolve a_____.
(a) Better variety
(b) Heterozygosis
(c) Pure line
(d) GM food
► (c) Pure line
13. In order to obtain virus-free plants through tissue culture the best method is
(a) Protoplast culture
(b) Embryo rescue
(c) Anther culture
(d) Meristem culture
► (d) Meristem culture
14. Which variety of wheat is used as donor for high protein?
(a) IR-8
(b) Sonalika
(c) Atlas 66
(d) Himgiri
► (c) Atlas 66
15. Which of the following scientist’s name is not correctly matched with the theory by them?
(a) Pasteur – Theory of Pangenesis
(b) De Vries – Theory of continuity
(c) Weismann – Theory of continuity of Germplasm
(d) Mendel – Inheritance of acquired characters
► (d) Mendel – Inheritance of acquired characters
16. Which one is not a common freshwater fish?
(a) Catla
(b) Hilsa
(c) Common carp
(d) Rohu
► (b) Hilsa
17. At cryopreservation of germplasm, biological activity
(a) Essentially ceases
(b) Cell division stops
(c) No genetic change occurs
(d) All of the above
► (d) All of the above
18. Which of the following can yield a completely haploid plant?
(a) Root tip
(b) Anther
(c) Carpel
(d) Stem apical meristem
► (b) Anther
19. A lake near a village suffered heavy mortality of fishes within a few days. Consider the following reasons for this.
(a) Heavy rain
(b) Spraying of DDT by helicopter
(c) Excess water
(d) Change in temperature
► (b) Spraying of DDT by helicopter
20. Aphids or plant lice cause major damage to the crops. Which variety of crops has been developed for its resistance towards the attack of aphids?
(a) Pusa Gaurav
(b) Pusa Sem 2
(c) Pusa Swami
(d) Pusa A-4
► (a) Pusa Gaurav
21. The scientific process by which crop plants are enriched with certain desirable nutrients is called
(a) Breeding
(b) Biofortification
(c) Crop protection
(d) Bioremediation
► (b) Biofortification
22. Which one of the following pairs of organisms are exotic species introduced in India ?
(a) Lantana camara, water hyacinth
(b) Water hyacinth, Prosopis cinereria
(c) Nile perch, Ficus religiosa
(d) Ficus religiosa, Lantana camara
► (a) Lantana camara, water hyacinth
23. What made Dr M. S. Swaminathan famous?
(a) Being a horticulturist
(b) Being a geneticist
(c) Being a plant breeder
(d) All of the above
► (d) All of the above
24. Which of the following is not used as a biopesticide ?
(a) Trichoderma harzianum
(b) Nuclear Polyhedrosis Virus (NPV)
(c) Xanthomonas campestris
(d) Bacillus thuringiensis
► (c) Xanthomonas campestris
25. The technique of obtaining a large number of plantlets by the tissue culture method is called
(a) Plantlet culture
(b) Micropropagation
(c) Macropropagation
(d) Organ culture
► (b) Micropropagation
26. Heterosis is
(a) Hybrid compatibility
(b) Hybrid vigour
(c) Pollen sterility
(d) Pollen-pistil incompatibility
► (b) Hybrid vigour
27. Tissue culture technique can produce infinite number of new plants from a small parental tissue. The economic importance of the technique is in raising
(a) Variants through picking up somaclonal variations
(b) Genetically uniform population identical to the original parent
(c) Homozygous diploid plants
(d) Development of new species
► (b) Genetically uniform population identical to the original parent
28. Hybrid vigour is mostly due to
(a) Heterozygosity
(b) Homozygosity of pure characters
(c) Mixing up of cytoplasm
(d) Superiority of all the genes
► (a) Heterozygosity
29. Which of the following has maximum genetic diversity in India?
(a) Rice
(b) Mango
(c) Wheat
(d) Groundnut
► (a) Rice
30. Which one is an alternate source of proteins for animals and human nutrition?
(a) Soya Bean
(b) Meat
(c) Milk
(d) Single cell protein
► (d) Single cell protein
31. Which part would be most suitable for raising virus-free plants for micropropagation ?
(a) Bark
(b) Vascular tissue
(c) Meristem
(d) Node
► (c) Meristem
32. To obtain disease-free plants through tissue culture techniques, the best method is
(a) Protoplast culture
(b) Meristem culture
(c) Embryo rescue
(d) Anther culture
► (b) Meristem culture
33. Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?
(a) Black rust of wheat
(b) Loose smut of wheat
(c) Bacterial leaf blight of rice
(d) Downy mildew of grapes
► (d) Downy mildew of grapes
34. One of the major difficulties in the biological control of insect pests is the
(a) practical difficulty of introducing the predator to specific areas
(b) method is less effective as compared with the use of insecticides
(c) predator does not always survive when transferred to a new environment
(d) the predator develops a preference to other diets and may itself become a pest.
► (d) the predator develops a preference to other diets and may itself become a pest.