Which of the following ions is pumped into th | vedclass

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(D) According to the Acid Growth Hypothesis,auxin stimulates the activity of $H^+$-ATPase pumps in the plasma membrane.These pumps actively transport

Vedclass · Accepted Answer

$H^+$

Vedclass · Answer

(D) According to the Acid Growth Hypothesis,auxin stimulates the activity of $H^+$-ATPase pumps in the plasma membrane.These pumps actively transport $H^+$ ions from the cytoplasm into the cell wall (apoplast).This acidification of the cell wall lowers the pH,which activates enzymes called expansins.Expansins break the cross-links between cellulose microfibrils,allowing the cell wall to loosen and expand,which facilitates cell growth.

Which of the following ions is pumped into the apoplast by auxin during cell growth?

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