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NEET2026BiologyChapterActual

Which of the following physiological responses is correctly attributed to Cytokinins?

Options

  1. AStimulation of internode elongation in rosette plants just prior to flowering
  2. BPromotion of nutrient mobilisation which helps in the delay of leaf senescence
  3. CInduction of parthenocarpy in fruits such as tomatoes
  4. DInitiation of rooting in stem cuttings for plant propagation

Correct answer

B. Promotion of nutrient mobilisation which helps in the delay of leaf senescence

Step-by-step solution

Cytokinins are plant growth regulators that play a crucial role in cell division and delay of senescence. They promote nutrient mobilisation, which helps in the delay of leaf senescence, a phenomenon known as the Richmond-Lang effect. Stimulation of internode elongation in rosette plants (bolting) is a function of Gibberellins. Induction of parthenocarpy in tomatoes and initiation of rooting in stem cuttings are functions primarily associated with Auxins. Answer: Promotion of nutrient mobilisation which helps in th

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