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bio
3.1 and 3.2
Term | Definition |
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cell theory | theory that states that all organisms are made of cells, all cells are produced by other living cells, and the cell is the most basic unit of life. |
cytoplasm | jellylike substance inside cells that contains molecules and in some cells organelles. |
organelle | membrane-bound structure that is specialized to per- form a distinct process within a cell. |
prokaryotic cell | cell that does not have a nucleus or other membrane-bound organelles. |
eukaryotic cell | cell that has a nucleus and other membrane-bound organelles. |
cytoskeleton | network of proteins, such as microtubules and microfilaments, inside a eukaryotic cell that supports and shapes the cell. |
nucleus | organelle composed of a double membrane that acts as the storehouse for most of a cell’s DNA. |
endoplasmic reticulum | interconnected network of thin, folded membranes that produce, process, and distribute proteins. |
ribosome | organelle that links amino acids together to form proteins. |
Golgi apparatus | stack of flat, membrane-enclosed spaces containing enzymes that process, sort, and deliver proteins. |
vesicle | small organelle that contains and trans- ports materials within the cytoplasm. |
mitochondrion | bean-shaped organelle that supplies energy to the cell and has its own ribosomes and DNA. |
vacuole | organelle that is used to store materials, such as water, food, or enzymes, that are needed by the cell. |
lysosome | organelle that contains enzymes |
centriole | small cylinder-shaped organelle made of protein tubes arranged in a circle; aids mitosis |
cell wall | rigid structure that gives protection, support, and shape to cells in plants, algae, fungi, and bacteria. |
chloroplast | organelle composed of numerous membranes that are used to convert solar energy into chemical energy; contains chlorophyll. |