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Cell Structure

QuestionAnswer
Organelle any of a number of organized or specialized structures within a living cell.
Cytoplasm the material or protoplasm within a living cell, excluding the nucleus.
Nucleus a dense organelle present in most eukaryotic cells, typically a single rounded structure bounded by a double membrane, containing the genetic material.
Nuclear Envelope surrounds the genetic material and nucleolus in eukaryotic cells
Chromatin The DNA double helix in the cell nucleus is packaged by special proteins termed histones
Chromosome a threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes
Nucleolus a small dense spherical structure in the nucleus of a cell during interphase
Ribosome a minute particle consisting of RNA and associated proteins, found in large numbers in the cytoplasm of living cells. They bind messenger RNA and transfer RNA to synthesize polypeptides and proteins
Endoplasmic Reticulum a network of membranous tubules within the cytoplasm of a eukaryotic cell, continuous with the nuclear membrane. It usually has ribosomes attached and is involved in protein and lipid synthesis
Golgi Apparatus a complex of vesicles and folded membranes within the cytoplasm of most eukaryotic cells, involved in secretion and intracellular transport
Lysosome an organelle in the cytoplasm of eukaryotic cells containing degradative enzymes enclosed in a membrane
Cytoskeleton a microscopic network of protein filaments and tubules in the cytoplasm of many living cells, giving them shape and coherence
Centrioles a minute cylindrical organelle near the nucleus in animal cells, occurring in pairs and involved in the development of spindle fibers in cell division
Vacuole a space or vesicle within the cytoplasm of a cell, enclosed by a membrane and typically containing fluid
Mitochondrion an organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur
Chloroplasts a plastid that contains chlorophyll and in which photosynthesis takes place
Cell Wall a rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants, fungi, and bacteria. In the algae and higher plants, it consists mainly of cellulose
Cell Membrane the semipermeable membrane surrounding the cytoplasm of a cell
Selectively Premeable a type of biological or synthetic, polymeric membrane that will allow certain molecules or ions to pass through it by diffusion
Created by: jmccarth