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Chapter 4 Section 3

Bio Vocab

TermDefinition
Phospholipid Bilayer A double layer of phospholipids that makes up plasma and organelle membranes
Chromosome In a eukaryotic cell, one of the structures in the nucleus that are made up of DNA and protein; in a prokaryotic cell, the main ring of DNA
Nuclear Envelope The double membrane that surrounds the nucleus of a eukaryotic cell
Nucleolus The part of the eukaryotic nucleus 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 that is surrounded by two 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 A system of flattened, membranous sacs; modifies many cellular products and prepares them for export
Lysosome A cell organelle that contains digestive enzymes
Cytoskeleton The cytoplasmic network of protein filaments that plays an essential role in cell movement, shape, and division
Microtubule One of the small, tubular fibers composed of the protein tubulin that are found in the cytoplasm of eukaryotic cells, that compose the cytoskeleton, and that 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 hairlike structure arranged in tightly packed rows that projects from the surface of some cells
Flagellum A long, hairlike structure that grows out of a cell and enables the cell to move
Centriole An organelle that is active during mitosis
Created by: Sadrian18
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