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NTA Abhyas NEET2020BotanyMineral NutritionPractice

Zinc is essential for:

Options

  1. ABiosynthesis of chlorophylls
  2. BBiosynthesis of 3-IAA
  3. CStomatal closing
  4. DOxidation of carbohydrates

Correct answer

B. Biosynthesis of 3-IAA

Step-by-step solution

Plants obtain zinc as Zn 2+ ions. It activates various enzymes, especially carboxylases. It is also needed in the synthesis of auxin. Indole-3-acetic acid (3-IAA) is is the most common naturally occurring plant hormone of the auxin class.

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