| A | B |
|---|
| thin,outer boundary of a cell which controls the movement of substances in or out of the cell | plasma membrane |
| the mix of fine particles of ions, protein molecules, etc that stay in suspension in the cytoplasm of a cell | cytoplasmic matrix (or "cytosol") |
| organelles that transfer energy in sugars into usable cell energy | mitochondria (singular=mitochondrion) |
| small, spherical organelles that synthesize proteins | ribosomes |
| fine, branching, tubular passageways in a cell that help transport materials; some portions of it may be covered with ribosomes and therefore is the site of much protein synthesis | endoplasmic reticulum |
| a flattened, curved, sac-like organelle that prepares substances to be secreted by the cell | golgi apparatus |
| organelles filled with digestive enzymes that break down ingested substances, old organelles, and molecules in the cytoplasm | lysosomes |
| tiny fibers in the cytoplasm of some cells that provide structural support and may be necessary for movement or reproduction | cytoskeleton |
| whip-like, tail structures that can provide locomotion for some cells | flagella (singular=flagellum) |
| tiny, hair-like projections on the outside of some cells that provide locomotion or may move substances over the surface of the cell | cilia (singular=cilium) |
| a storage cavity, lined with plasma membrane, that may contain water only or water with ingested food | vacuole |
| a small storage cavity or vacuole that may contain enzymes for specific reactions | vesicle |
| the controlling organelle of a cell where all the chromosomes (DNA) are located; here RNA is also produced | nucleus |
| In plant cells only, this structure surrounds the plasma membrane to protect and support the cell; composed of cellulose | cell wall |
| In plant cells only, these structures house pigmants or store starches (example: chloroplasts) | plastids |
| In plant cells only, this large storage cavity, filled with water, regulates the turgidity (or turgor pressure) of the cell | central vacuole |
| small structure within a cell's nucleus that has a high concentration of RNA and proteins | nucleolus |
| all of the chromosomes(DNA) in the nucleus when the chromosomes are in their long, thin state, resembling a tangled mass | chromatin material |
| the double membrane that forms the outer surface of the nucleus | nuclear envelope |
| flexible, rod-like assembly of protein molecules found in cells | mircofilament |
| all the components inside a cell EXCEPT for the nucleus | cytoplasm |
