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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.
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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
- Alcoholic fermentation takes place in the presence of
- Exchange of gases in the alveoli of lungs takes place through
- If for some reason the parietal cells of the gut epithelium become partially
- An example of synovial joint is found between
- Net gain of ATP from one glucose molecule during glycolysis is
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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