A) outward movement of malate
B) inward movement of \[{{K}^{+}}\]
C) outward movement of protons
D) inward movement of \[C{{l}^{-}}\]
Correct Answer: C
Solution :
Ion movements into and out of the guard cells during stomatel closure and opening depend on proton pumping of ATPase which provides the proton gradients that are coupled to other secondary active transport mechanisms for \[{{K}^{+}}\]and\[C{{l}^{-}}\]. The outward movement of protons is directly involves-.in expenditure of energy.
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