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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: - A jawless fish, which lays eggs in fresh water and whose ammocoetes larvae after
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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
- A jawless fish, which lays eggs in fresh water and whose ammocoetes larvae after
- A young infant may be feeding entirely on mothers milk
- Which of the following vein has least amount of urea
- When man eats fish which feeds on zooplankton which have eaten small plants
- What is true about RBC s in humans?
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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