THE CELL
TRANSPORT INTO AND OUT OF THE CELL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Facilitate the movement of particles across the cell membrane
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Receive chemical signals from other cells to begin a process in the cell
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Code for specific structures found in the cell membrane
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Create a hydrophobic layer that forms a barrier between the inside and outside of the cell
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Detailed explanation-1: -Carrier proteins bind specific molecules to be transported on one side of the membrane. They then undergo conformational changes that allow the molecule to pass through the membrane and be released on the other side.
Detailed explanation-2: -Membrane proteins provide temporary binding sites that guide cell migration and other cell-to-cell interactions. It also acts as receptors, enzymes, cytoskeletal proteins, etc. It mediates processes that are fundamental for flourishing biological cells. It helps cells to communicate.
Detailed explanation-3: -Carrier proteins and channel proteins are the two major classes of membrane transport proteins. Carrier proteins (also called carriers, permeases, or transporters) bind the specific solute to be transported and undergo a series of conformational changes to transfer the bound solute across the membrane (Figure 11-3).
Detailed explanation-4: -11.4 Aquaporins. Aquaporins are transmembrane proteins that regulate the flow of water into and out of cells.
Detailed explanation-5: -Facilitated diffusion is diffusion that is helped along (facilitated by) a membrane transport channel. These channels are glycoproteins (proteins with carbohydrates attached) that allow molecules to pass through the membrane.