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The ions extruded by auxin during cell wall extension is
Options
(a) potassium
(b) sodium
(c) magnesium
(d) hydrogen
Correct Answer:
hydrogen
Explanation:
IAA brings about cell wall extension by activating proton pump which maintains the cell wall in an acidic condition of around 4 pH. Under these conditions, the cell wall pressure is reduced and water enters the cell, accompained by an increase in cell volume. As the cell increases in volume, the new cell wall material becames necessary to stabilise the wall. IAA is naturally occuring auxin.It also promotes cell enlargements, cell division in vascular cambium, root intiation and apical dominance.
Related Questions: - In bony vertebrates, the formation of bone is often preceded by the presence of a
- Fungi differ from other kingdom in being
- Which is not a characteristic of Taenia
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Topics: Plant Growth and Development
(126)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In bony vertebrates, the formation of bone is often preceded by the presence of a
- Fungi differ from other kingdom in being
- Which is not a characteristic of Taenia
- Which of the following organisms are known as chief producers in the oceans
- Clitellum segment of earthworm constitues segments
Topics: Plant Growth and Development (126)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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