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Asked: 2025-09-27T08:43:25+00:00 In:

The plant hormone whose concentration stimulates the cells to grow longer on the side of the shoot which is away from light is:

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Poll Results

0%(A) Cytokinins
0%(B) Gibberellins
0%(C) Adrenaline
100%(D) Auxins ( 1 voter )
Based On 1 Vote

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Auxins are plant hormones that stimulate cell elongation on the side of the shoot away from light, causing the shoot to bend towards light. This process is called phototropism, helping the plant capture sunlight efficiently. The correct answer is (D) Auxins.

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    1 Answer

    1. ANSWER: [D]

      Explanation: Auxins are plant hormones that accumulate on the shaded side of the shoot when exposed to light. This higher concentration stimulates cells on the dark side to elongate more, causing the shoot to bend towards the light. This response is called phototropism.

      • Cytokinins → promote cell division.
      • Gibberellins → help in stem elongation and seed germination.
      • Adrenaline → an animal hormone, not a plant hormone.

      Hence, the bending of shoots towards light is controlled by auxins.

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