How Does Auxin Binding to the Auxin Receptor Trigger Cell

question 42

Multiple Choice

How does auxin binding to the auxin receptor trigger cell elongation?

• A) The auxin receptor is a proton channel that opens in response to auxin binding, allowing protons to flow down their concentration gradient and into the cell.
• B) A signal transduction cascade results in the opening of a water pore that allows water into the cell, causing it to swell.
• C) A signal transduction cascade causes proton channels to open, and protons to flow down their concentration gradient and out of the cell.
• D) The auxin receptor begins phosphorylating proton pumps, activating them to pump protons up their concentration gradient and out of the cell.
• E) A signal transduction cascade causes additional proton pumps to be made, and those proteins pump protons up their concentration gradient and out of the cell.

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