The process by which cells use energy to transport molecules through the cell membrane from areas of low concentration to areas of high concentration

any one of several building blocks of protein

the basic unit of structure and function that makes up all organisms

the thin boundary between the cell and its environment

the process in which nutrients are broken apart, releasing the chemical energy stored in them

the green organelle that contains chlorophyll

the flow of materials within a cell as well as between parts of multi-cellular organisms

the jellylike substance that is between the cell membrane and the nucleus and that contains specialized structures

the movement of molecules from areas of high concentration to areas of low concentration

the process that breaks down large food molecules into simpler molecules that the organism can use

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