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The activity of α-amylase in the endosperm of a germinating seed of barley is induced by

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Important Questions on Plant Growth and Development

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 15 - Plant Growth and Development>MCQS CORNER>Q 71
Kinetin, a modified form of adenine was discovered from
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 15 - Plant Growth and Development>MCQS CORNER>Q 72
Hormone primarily concern with cell division is
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 15 - Plant Growth and Development>MCQS CORNER>Q 73
Match Column I with II and select the correct option from the codes given below.
  I   II
(a) Natural auxin (i) NAA
(b)  Synthetic auxin (ii) Zeatin
(c) Bakane disease of rice (iii) IAA
(d)  Natural cytokinin (iv) GA
    (v)  Kinetin
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 15 - Plant Growth and Development>MCQS CORNER>Q 74
Natural cytokinins are synthesised in regions where rapid cell division occurs. Such regions are
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 15 - Plant Growth and Development>MCQS CORNER>Q 75
What would happen if you forget to add cytokinin to the culture medium?
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 15 - Plant Growth and Development>MCQS CORNER>Q 76
In addition to auxins,________ must be supplied to culture medium to obtain a good callus in plant tissue culture.
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 15 - Plant Growth and Development>MCQS CORNER>Q 77
In plant tissue culture experiments, high auxin to cytokinin ratio favours ________ development and high cytokinin to auxin ratio favours ________ development.
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 15 - Plant Growth and Development>MCQS CORNER>Q 78
A plant hormone used for inducing morphogenesis in plant tissue culture is