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ATP Synthase
The enzyme that uses the energy from the proton gradient to catalyze the synthesis of ATP from ADP and inorganic phosphate.
Membrane-bound Organelles
Organelles such as the nucleus, lysosomes, and vacuoles are surrounded by lipid bilayers, which act like security doors—letting the right molecules in and keeping the wrong ones out.
Organelles
Organelles are structures inside cells that perform specific jobs to keep the cell alive. Their form suits their function perfectly.
Vesicles
Vesicles are small, membrane-bound sacs composed of a phospholipid bilayer. They enclose a fluid-filled space and can carry various substances.