E-PolyLearning

46. Microinjection technique of introducing NA is a
a. physical method
b. biological method
c. combination of physical and biological method
d. chemical method
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Answer: (a).physical method

47. MS medium, is found essential for initial morphogenesis of the immature embryos and to enhance callus development, when supplemented with
a. GA3
b. GA3 and coconut milk
c. adenine
d. adenine and kinetin
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Answer: (b).GA3 and coconut milk

48. Which of the following govern sporophytic self-incompatibility in Brassica?
a. Aegilops
b. Triticum
c. Both (a) and (b)
d. S alleles
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Answer: (d).S alleles

49. Commercial sugarcane is heterozygons with germplasm from
a. 1-3 Saccharum species
b. 3-5 Saccharum species
c. 5-7 Saccharum species
d. 7-9 Saccharum species
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Answer: (b).3-5 Saccharum species

50. The intervention in the communication system of nematodes offer several possibilities of bio control. Which of the following(s) play(s) a very important role in the host recognition?
a. Protein
b. Lipid
c. Carbohydrate moiety
d. Minerals
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Answer: (c).Carbohydrate moiety