According to the acid-growth hypothesis, auxin causes increased acidity in cell walls, which then activates ____ that disrupt(s) bonds between cellulose microfibrils, allowing cell expansion. A) a membrane potential B) AUX1 transporters C) proteins called expansins D) an mRNA E) K⁺ions

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The acid-growth hypothesis suggests that auxin increases the acidity of cell walls, which activates proteins known as expansins. These proteins help in disrupting the bonds between cellulose microfibrils, facilitating cell expansion.

According to the Acid-Growth Hypothesis, Auxin Causes Increased Acidity in Cell