| A | B |
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| Cell | Collection of living matter enclosed by a barrier that separates the cell from its surroundings; basic unit of all forms of life |
| Cell Theory | idea that all living things are composed of cells,, cells are the basic units of structure and function in living things, and new cells are p[produced for existing cells |
| Nucleus | the center of the atom which contains the protons and neutrons; in cell structure that contains the cell’s genetic material (DNA) and controls the cell’s genetic activities. |
| Eukaryote | organism whose cells contain nuclei |
| Prokaryote | a singled celled organism lacking a nucleus |
| Organelle | specialized structure that performs important cellular function within a eukaryotic cell. |
| Cytoplasm | material inside the cell membrane--not including the nucleus |
| Nuclear envelpe | layer or two membranes that surrounds the nucleus |
| chromation | granular material visible within the nucleus; consist of DNA tightly coiled around proteins |
| chromosome | threadlike structure within the nucleus containing the genetic information that is passed form on generation of cells to the next |
| nucleolus | small dense region within most nuclei in which the assembly of proteins begin. |
| ribosome | small particle in the cell on which proteins are assembled; made of RNA and protein. |
| endoplasmic reticulum | internal membrane system in cells in which lipid components of the cell membrane are assembled and some proteins are modified |
| golgi apparatus | stacks of membranes in the cell that modifies, sorts, and packages proteins form the endoplasmic reticulum |
| Laysosome | cell organelle filed with enzymes needed to break down certain materials in the cells |
| vacuole | cell organelle that stories materials such as water, salts, proteins, and carbohydrates. |
| mitochondrion | cell organelle that converts the chemical energy stored in food into compounds that are more convenient for the cell use |
| chlorplast | organelle found in cells of plants and some other organisms that capture the energy from sunlight and converts it into chemical energy |
| cytoskeleton | network of protein filaments within some cells that helps maintain its shape and is involved in many forms of cell movement |
| centriole | one of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope |
