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OJEE Auxin — practice questions

Explore 1 free Auxin questions in OJEE Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Auxin questions and exercises with answers

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**Auxins** were first isolated from:Read the answer and worked solution →

Worked practice questions

**Auxins** were first isolated from:

  1. Coleoptile tips of oat (Avena sativa)
  2. Pea seeds
  3. Coconut milk
  4. Rice husk
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Correct answer: A. Coleoptile tips of oat (Avena sativa)

F.W. Went (1928) isolated auxin from oat (Avena) coleoptile tips. Indole-3-acetic acid (IAA) is the most common natural auxin. Promotes cell elongation, apical dominance, root initiation.

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