Some membrane proteins use energy to increase the concentration of hydrogen ions on one side of the membrane. By which type of transport are the hydrogen ions able to become more concentrated? A. Exocytosis B. Osmosis C. Facilitated diffusion D. Active transport
Biology · High School · Mon Jan 18 2021
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Correct answer is d (active transport) .
Some membrane proteins use energy to increase the concentration of hydrogen ions on one side of the membrane. By active transport are the hydrogen ions able to become more concentrated .
During electron transport, energy is used to pump hydrogen ions across the mitochondrial inner membrane, from the matrix into the intermembrane space. A chemiosmotic gradient causes hydrogen ions to flow back across the mitochondrial membrane into the matrix, through ATP synthase, producing ATP.
active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration—against the concentration gradient. Active transport requires cellular energy to achieve this movement.