E-PolyLearning

56. Subculturing is similar to propagation by cuttings because
a. it separates multiple microshoots and places them in a medium
b. it uses scions to produce new microshoots
c. they both use in vitro growing conditions
d. all of the above
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Answer: (a).it separates multiple microshoots and places them in a medium

57. The ability of the component cells of callus to form a whole plant is known as
a. redifferentiation
b. dedifferentiation
c. either (a) or (b)
d. none of these
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Answer: (a).redifferentiation

58. What is/are the benefit(s) of micropropagation or clonal propagation?
a. Rapid multiplication of superior clones
b. Multiplication of disease free plants
c. Multiplication of sexually derived sterile hybrids
d. All of the above
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Answer: (d).All of the above

59. A(n) __________ is an excised piece of leaf or stem tissue used in micropropagation.
a. microshoot
b. medium
c. explant
d. scion
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Answer: (c).explant

60. Protoplasts can be produced from suspension cultures, callus tissues or intact tissues by enzymatic treatment with
a. cellulotyic enzymes
b. pectolytic enzymes
c. both cellulotyic and pectolytic enzymes
d. proteolytic enzymes
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Answer: (c).both cellulotyic and pectolytic enzymes