A property of cell membranes that allows some substances to pass through, while others cannot.
The process by which molecules move from an area in which they are highly concentrated to an area in which they are less concentrated.
The diffusion of water molecules through a selectively permeable membrane.
The movement of materials through a cell membrane without using energy.
The movement of materials through a cell membrane using energy.
The process by which plants and some other organisms capture light energy and use it to make food from carbon dioxide and water.
A substance that gives chloroplasts their green color and captures light energy during photosynthesis.
The process by which cells break down simple food molecules to release the energy they contain.
The process by which cells break down molecules to release energy without using oxygen.
The regular sequence of growth and division that cells undergo.
The stage of the cell cycle that takes place before cell division occurs; during this stage, the cell grows, copies its DNA, and prepares to divide.
The process by which a cell makes a copy of the DNA in its nucleus.
The stage of the cell cycle during which the cell's nucleus divides into two new nuclei and one copy of the DNA is distributed into each daughter cell.
One of the pair of the identical rods of a chromosome.
The final stage of the cell cycle, in which the cell's cytoplasm divides, distributing the organelles into each of the two new cells.