The GATE Grind

GATE 2024 BT – Question 49

Plant, Animal and Microbial Biotechnology · Plants: Totipotency, organogenesis, regeneration, growth regulators, tissue and cell suspension culture, secondary metabolites · 2 marks · Multiple select

Which of the following is/are synthetic auxin(s) that does/do NOT occur naturally?

  1. 2,4-Dichlorophenoxyacetic acid
  2. Indole-3-acetic acid
  3. Indole-3-butyric acid
  4. 1-Naphthaleneacetic acid

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Show answer and explanation

Correct answer: (A) 2,4-Dichlorophenoxyacetic acid; (D) 1-Naphthaleneacetic acid

Explanation

2,4-D and NAA are synthetic. IAA is the main natural auxin and IBA is also found naturally in plants.