Class XI

Which of the following gibberellic acid is used for malting process in brewing industry?
  1. GA1
  2. GA
  3. GA3
  4. GA2
Antiauxin used in picking cotton bolls is
  1. 2,4-D
  2. TIBA
  3. Ethylene
  4. NNA
Plant growth regulator that is used in delay in leaf senescence is
  1. Auxin
  2. Cytokinin
  3. Ethylene
  4. ABA
Photoperiodism was discovered by
  1. W.Went
  2. F.E.Fritsch
  3. Garner and Allard
  4. F.F.Blackman
Which pair of enzyme promotes femaleness in flowers?
  1. Auxin and ethylene
  2. Ethylene and cytokinins
  3. None of these
  4. Auxin and abscisic acid
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