Which of the Following Is True of Gated Ion Channels

question 59

Multiple Choice

Which of the following 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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