Auxin's polar transport relies in part on the fact that auxin is a weak acid that A) binds H⁺ in high pH conditions. B) ionizes to release H⁺ in neutral pH conditions. C) forms a base in the cell wall. D) is passively transported across cells. E) pumps protons across the cell membrane.

Question

Quizplus · Accepted Answer

Auxin is a weak acid that ionizes to release positively charged ions (H^{+) and negatively charged ions (}-) in neutral pH conditions. This ionization allows for polar transport of auxin as the negatively charged ions can move towards the positively charged end of the cell, while the positively charged ions can move towards the negatively charged end of the cell. This transport is facilitated by specialized proteins, such as PIN proteins.

Auxin's Polar Transport Relies in Part on the Fact That