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4.3 Terms

TermDefinition
phospholipid bilayer a double layer of phospholipids that makes up plasma and organelle membranes
chromosome in a eukaryote cell, one of the structures in the nucleus that are made up of DNA and protein; in a prokaryote, the main ring of DNA
nuclear envelope the double membrane that surrounds the nucleus of an eukaryotic cell
nucleolus the part of an eukaryotic nucleus where ribosomal RNA is synthesized
ribosome a cell organism composed of RNA and protein; the site of protein synthesis
mitochondrion in eukaryote cells, the cell organelle that is surrounded by two membranes and is the site of cellular respiration, which make 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 composed of the protein tubulin that are found in the cytoplasm, compose the cytoskeleton, 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 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 a cell and enables a cell to move
centriole an organelle that is composed of two short microtubules at right angles to each other and that has an active roll in mitosis
Created by: Addaleigh