THE CELL
STRUCTURE AND FUNCTION OF THE CELL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Nonpolar substances would no longer cross the cell membrane.
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Large polar substances would no longer be able to cross the cell membrane.
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The rate of diffusion for polar substances would increase
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The rate of bulk transport would decrease.
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Detailed explanation-1: -what would happen to a cell if its channel proteins were damage and unable to transport particles? what would happen to the organism if many of its cells were damaged in this way? if you can’t transport particles like you do in exocytosis waste would not be able to leave the cell so it would damage the cell.
Detailed explanation-2: -In general, channel proteins transport molecules much more quickly than do carrier proteins. This is because channel proteins are simple tunnels; unlike carrier proteins, they don’t need to change shape and “reset” each time they move a molecule.
Detailed explanation-3: -Carrier proteins known as uniporters bind to glucose molecules one at a time. The binding action causes a conformational change in the protein, which causes it to deposit the molecule on the opposite side of the cell.
Detailed explanation-4: -A carrier protein is a transport protein that is specific for an ion, molecule, or group of substances. Carrier proteins “carry” the ion or molecule across the membrane by changing shape after the binding of the ion or molecule. Carrier proteins are involved in passive and active transport.