Which Statement Is TRUE of Gated Ion Channels

question 2

Multiple Choice

Which statement is TRUE of gated ion channels?

• A) Each channel can allow 10 million ions per second through the membrane.
• B) The gating mechanism involves piston-like movement of the transmembrane helices.
• C) Each channel lets both positive and negative ions flow through the pore.
• D) Closing of the gate requires phosphorylation of the channel protein.
• E) Gated channels only respond to intracellular ligands.

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