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| the main function of the cell wall is to provide support and protection for the cell. |
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| both plant and animal cells contain a variety of organelles. Some structures are specific to either plant or animal cells. Others are found in both types of cells. |
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| The nucleus controls most of cell processes and contains the heredietary informtion of DNA (deoxyribonucleic acid.) |
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| The granular material visible within the nucleus. |
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| When a cell divides, however,chromatin condenses to form. |
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| Most nuclei also contain a small, dense region. |
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| The nucleus is surronded by double-membrane layer. |
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| The cytoskeleton is a network of protein filaments that helps the cell to maintain its shape. The cytoskeleton is also involved in many forms of cell movement. |
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| One of the most important jobs carried out in the cell is making proteins. |
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| The endoplasmic reticulum is the organelle in which components of the cell membrane are assembled and some proteins are modified. |
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| Enzymes in the Golgi apparatus attach carbohydrates and lipids to proteins |
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| Small organelles filled with enzymes |
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| Cells often store materials such as water, salts, proteins, and carbohydrates in saclike structures. |
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| Chloroplasts use the nergy from sunlight to make energy-rich food molecules in a process know as photosynthesus. |
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| Mitochondria use energy from food to make high-energy compounds that the cell can use to power growth, development, and movement |
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| The cell membrane regulates what enters and leaves the cell and also provide protection and support. |
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| Diffusion xauses many substances to move across a cell membrane but does not require the cell to use energy. |
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| Osmosis is the diffusion of water through a selectively permeable membrane. |
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