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Questions and Answers
What is the main source of energy for active transport across the cell membrane?
Which of the following is a function of aquaporins in living cells?
What is the role of coupled transport in cells?
Which type of protein carriers are involved in active transport across membranes?
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What distinguishes symporters from antiporters in active transport?
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Which process requires energy to move substances from regions of lower to higher concentration?
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Which type of molecules can move through the hydrophobic lipid bilayer by simple diffusion?
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What kind of protein has a hydrophilic channel that allows polar molecules to pass through when the channel is open?
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In facilitated diffusion, the transported molecule is released on the other side of the membrane when it binds to which type of protein?
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Which type of transport across the membrane moves substances freely by diffusion from regions of higher concentration to lower concentration?
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Which type of transport across the membrane is usually selective for one type of molecule, providing a selective permeable membrane?
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What is the role of the membrane protein described in the text?
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How does the Na+ gradient drive sugar molecules into the cell?
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Which process is responsible for maintaining the Na+ gradient?
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What is the function of ionophores in membrane transport processes?
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Which process involves the discharge of material from vesicles at the cell surface?
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What occurs during receptor-mediated endocytosis?
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