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NTA Abhyas NEET2020BotanyPlant - Growth and DevelopmentPractice

How many of the following auxins are synthetic? IAA; IBA; NAA; 2,4-D

Options

  1. AOne
  2. BTwo
  3. CThree
  4. DAll

Correct answer

B. Two

Step-by-step solution

Indole acetic acid (IAA) and Indole butyric acid are natural auxin synthesized in plants. Naphthalene acetic acid and 2,4 dichlorophenoxy acetic acid are synthetic auxin. Auxin is mainly synthesized at shoot apex as light is necessary for the synthesis of auxin.

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