SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Gates charge you to get in.
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Gates keep everything out.
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Gates control how people enter and exit.
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all of the above
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Detailed explanation-1: -Ion channel proteins allow ions to diffuse across the membrane. A gated channel protein is a transport protein that opens a “gate, ‘’ allowing a molecule to pass through the membrane. Gated channels have a binding site that is specific for a given molecule or ion. A stimulus causes the “gate” to open or shut.
Detailed explanation-2: -There are two basic ways that substances can cross the plasma membrane: passive transport, which requires no energy; and active transport, which requires energy.
Detailed explanation-3: -When something that wants to enter a cell reaches a cell membrane and it can not enter via diffusion, a gate will open and allow the molecule to enter. The proteins that sit on the outside of the cell membranes act as the gates.