Zeatin

  1. Isolated from herring sperm
  2. Isolated from coconut milk and corn Kernels
  3. Isolated from corn Kernels
  4. Isolated from rice seedlings
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Natural Cytokinins are not found in

  1. Root apices
  2. Developing shoot buds
  3. Young Fruits
  4. Root hair zone
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Cytokinins

1. Helps to produce new leaves

2. Helps to produce chloroplasts in leaves

3. Lateral shoot growth, Adventitious Shoot Formation

4. All of these

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Cytokinin

Which of the following is not correct?

  1. Help to overcome apical dominance
  2. They promote nutrient mobilisation and helps in the delay of leaf senescence
  3. Lateral Shoot Growth
  4. Formation of Tap root
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Which of the following hormones is synthesised in large amounts by tissues undergoing senescence and ripening fruits?

  1. Ethylene
  2. ABA
  3. Auxins
  4. GA3
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Influences of Ethylene in plants do not include

  1. Horizontal growth of seedlings
  2. Swelling of the axis
  3. Apical hook formation in dicot seedlings
  4. Lateral shoot growth
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Ethylene does not perform

  1. Promotes senescence and abscission of plant organs especially of leaves and flowers
  2. Highly effective in fruit ripening
  3. Enhances the respiration rate during ripening of the fruits
  4. Overcome the apical dominance
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The rise in respiration rate of fruit is called

  1. Respiratory quotient
  2. Respiratory climactic
  3. Respiratory incision
  4. Respiratory succulence
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Respiratory climactic is due to

  1. Ethylene
  2. ABA
  3. GA
  4. Auxins
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The function which is not performed by Ethylene is

  1. Breaking of seed and bud dormancy
  2. Initiates germination in peanut seeds
  3. Improving the internode length of sugarcane
  4. Promotes rapid internode and petiole elongation in deep water rice plants
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