Cells require glucose as a source of energy to carry out life processes. Large molecules like glucose cross the cell's plasma membrane by A) being pumped through ion channels. B) active transport through protein channels. C) passive diffusion through the lipid bilayer. D) facilitated diffusion through protein channels.
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Step 1: Glucose is a large molecule that cannot pass through the lipid bilayer of the cell membrane on its own. Show more…
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The movement of glucose into a cell against a concentration gradient is most likely to be accomplished by which of the following? a) movement of glucose into the cell through a glucose channel b) receptor-mediated endocytosis c) cotransport of the glucose with a proton or sodium ion that was pumped across the membrane using the energy of ATP hydrolysis d) passive diffusion of the glucose through the lipid bilayer e) facilitated diffusion of the glucose using a carrier protein
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Which of the following is an example of facilitated diffusion? A. Sugar is transported into the cell via an energy-consuming process B. Hydrogen ions are pumped out of the cell against their concentration gradient C. Carbon dioxide exits the cell, passing directly through the cell membrane D. Water moves out of the cell, passing through channel proteins in the cell membrane
Facilitated transport differs from diffusion in that facilitated diffusion a. involves the passive use of a carrier protein. b. involves the active use of a carrier protein. c. moves a molecule from a low to a high concentration. d. involves the use of ATP molecules.
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