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MHT CET Medical202621 April 2026Evening ShiftBiologyPlant - Growth and DevelopmentActual

Which of the following pair of plant hormones have mevalonic acid as the precursor?

Options

  1. AAuxin and cytokinin
  2. BGibberellin and Abscisic acid
  3. CEthylene and Cytokinin
  4. DAuxin and Gibberellin

Correct answer

B. Gibberellin and Abscisic acid

Step-by-step solution

Plant growth regulators are small, simple molecules of diverse chemical composition. Auxin (IAA) is an indole compound derived from the amino acid tryptophan. Cytokinins are adenine derivatives (e.g., N^6 -furfurylamino purine). Ethylene is a gaseous hormone derived from the amino acid methionine. Gibberellins are terpenes, and Abscisic acid (ABA) is a derivative of carotenoids. Both terpenes and carotenoids are isoprenoids, which are synthesized via the mevalonic acid pathway. Therefore, both Gibberellin and Absci

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