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Bio Terms 4.3
Term | Definition |
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Phospholipid | -A lipid that contains phosphorus and that is a structural component in cell membranes. |
Chromosome | -In a eukaryotic cell, one of the structures in the nucleolus that are made up of DNA and protein; in a prokaryotic cell, the main ring of DNA. |
Nuclear Envelope | - A double membrane that surrounds the nucleolus of a eukaryotic cell. |
Nucleolus | In a eukaryotic cell, the part where ribosomal RNA is synthesized. |
Ribosome | -A cell organelle composed of RNA and protein; the site of protein synthesis. |
Mitochondrion | - In eukaryotic cells, the cell organelle is surrounded by membranes and that is the site of cellular respiration, which produces ATP. |
Endoplasmic Reticulum | -A system of membranes that is found in a cell's cytoplasm and that assists in the production, processing, and transport of proteins and in the production of lipids. |
Golgi Apparatus | -Cell organelle that helps make and package materials to be transported out of the cell. |
Lysosome | - A cell organelle that contains digestive enzymes and that buds from the Golgi apparatus. |
Cytoskeleton | -The cytoplasmic network of protein filaments and tubes that plays an essential role in cell movement, shape, and division. |
Microtubule | - One of the small, tubular fibers that are found in the cytoplasm of eukaryotic cells, that compose the cytoplasm, and play a role in cell structure and movement. |
Microfilament | - A fiber found inside eukaryotic cells that is composed mainly of the protein actin and that has a role in cell structure and movement. |
Cilium | - A hair like structure arranged in tightly packed rows that projects from the surface of some cells. |
Flagellum | - A long hair like structure that grows out of cells and enables the cell to move |
Centriole | -An organelle that is composed of two short microtubules at right angles to each other and that have an active role in mitosis. |