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Which of the following plant hormones controls fruit ripening?
1. Ethylene
2. Zeatin
3. Auxins
4. Gibberellic acid

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Correct Answer - Option 1 : Ethylene

The correct answer is Ethylene.

  • Ethylene hormones control fruit ripening.

  • ​Ethylene is a plant hormone that affects ripening and rotting in plants. 
  • Ethylene is produced in all parts of a plant and diffuses through the plant’s tissue, outside the plant, and travels through the air to affect a totally different plant.

  • Zeatin is a type of cytokinin derived from adenine.
    • It occurs in the form of a cis- and a trans-isomer and conjugates.
  • Auxin is a hormone involved in cell growth and cell expansion.
  • Gibberellic acids are naturally occurring plant hormones that are used as plant growth regulators to stimulate both cell division and elongation.

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