Question

Which of these is NOT true about ion channels?

-movement of ions through a channel is equivalent to an electrical current flowing across the membrane
-ions move through ion channels driven by a combined electrical and chemical gradient
-ion channels are basically holes or interruptions in the lipid bilayer of a membrane; ions squeeze between phospholipids
-ion channels are proteins that undergo conformation changes in structure

Answer 1

The statement that is NOT true about ion channels is that ions move through ion channels driven by a combined electrical and chemical gradient.

Step-by-step explanation:

Of the given options, the statement that is not true about ion channels is that "ions move through ion channels driven by a combined electrical and chemical gradient."

The movement of ions through ion channels is equivalent to an electrical current flowing across the membrane. This is because ions carry electric charge and their movement creates an electrical potential across the membrane.

Ion channels are basically holes or interruptions in the lipid bilayer of a membrane, allowing ions to squeeze between phospholipids. Ion channels are proteins that undergo conformational changes in structure, opening or closing to control the movement of ions in and out of cells.