| A | B |
|---|
| the smallest unit of life | cell |
| a barrier that separates a cell from its surroundings; it controls what comes in and goes out of the cell | cell membrane |
| molecules in a cell that contain genetic infomation | DNA |
| simple cells that do not have a nucleus; this type of cell is found in bacteria | Prokaryotic cells |
| cells that have a true nucleus and make up all other organisms other than bacteria | Eukaryotic cells |
| long, hairlike filament that some single-celled organisms use to propel them forward | Flagella |
| short, hairlike projections that some cells use for movement | cilia |
| network of very thin protein fibers that helps a cell keep its shape | cytoskeleton |
| used to produce and transport materials within a cell | endoplasmic reticulum |
| part of the cell that contains genetic information | nucleus |
| builds proteins by forming peptide bonds between amino acids | ribosomes |
| membranes that package and distribute proteins and lipids | Golgi apparatus |
| uses energy from food molecules to produce high-energy compounds (ATP); site of cellular respiration | mitochondria |
| Found only in plant cells; site of photosynthesis | chloroplasts |
| Dense structure inside the nucleus that is responsible for producing ribosomes | nucleolus |
| vesicles that store digestive enzymes and help rid the cell of worn-out organelles | lysosomes |
| vesicles that are used for storing water, salts, wastes, etc. | vacuoles |
| Cylindrical organelles that aid in cell division; only found in animal cells | centrioles |
| jelly-like fluid between the cell membrane and the nucleus that fills the space between organelles | cytosol or cytoplasm |
| cellulose structure that surrounds plant cells and gives them support and protection | cell wall |
