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AP Biology: Cell Parts Flashcards

Group 3, the biolo-gene-iuses

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8290536066Nucleusthe organelle of a eukaryotic cell that contains the genetic material in the form of chromosomes, made up of chromatin0
8290536067Nuclear Envelopein a eukaryotic cell, the double membrane surrounds the nucleus, perforated with pores that regulate traffic in the cytoplasm. the outer membrane is continuous with the endoplasmic reticulum; encloses the nucleus1
8290536069Chromosomesa cellular structure consisting of one DNA molecule and associated protein molecules (in some contexts, it may refer to the DNA alone); a eukaryotic cell typically has multiple, linear chromosomes located in the nucleus; a prokaryotic cell typically has a single, circular chromosome located in the nucleoid2
8290536070Chromatinthe complex of DNA and proteins that makes up eukaryotic chromosomes (when the cell is not dividing, chromatin exists as a mass of long and thin fibers)3
8290536071Nucleolusa specialized structure in the nucleus consisting of chromosomal regions containing ribosomal RNA (rRNA) genes along with ribosomal proteins imported from the cytoplasm; site of rRNA synthesis and ribosomal subunit assembly4
8290536072Ribosomea complex of rRNA and protein molecules that functions as a site of protein synthesis in the cytoplasm; consists of a large subunit and a small subunit. in eukaryotic cells, each subunit is assembled in the nucleolus5
8290536073Endosymbiont theoryA cell living within another cell The theory that mitochondria and plastids, including chloroplasts, originated as prokaryotic cells engulfed by host cells. The engulfed cell and its host cell then evolved into a single organism.6
8290536074Mitochondriasomewhat independent and help to grow and reproduce the cell plays a role in ATP production. (Powerhouse) found in all eukaryotes7
8290536075CristaeThe inner convoluted (complex) membrane of the mitochondria Houses electron transport trains and molecules of the enzyme catalyzing ATP Divides the mitochondrion into two separate inner chambers Enhances the productivity of cellular respiration8
8290536076Mitochondrial MatrixThe second compartment inside the mitochondrion created by the Cristae Contains enzymes and substrates for the citric acid cycle as well as ribosomes and DNA Some of the enzymes helps to catalyze cellular respiration9
8290536077ChloroplastAn organelle in plants that absorb sunlight and uses that as energy to drive the synthesis of organic compounds (glucose or sugar) from carbon dioxide and water (photosynthesis) Lens shaped, about 3-6μm They are found in eukaryotic plant cells10
8290536078Thylakoidssometimes connected membrane "sacs" located inside chloroplasts that convert light energy to chemical energy They are found in plant cells11
8290536079Granumthe term for a stacked amount of thylakoid Described as membrane bound stacks of thylakoid in the chloroplasts. Found in eukaryotic and plant cells12
8290536080StromaAids in the synthesis of organic molecules from carbon dioxide and water, and contains ribosomes and DNA Explained as the fluid that surrounds the thylakoid Found in eukaryotic and plant cells13
8290536081PeroxisomeSpecialized metabolic compartment bounded by a single membrane. Contain enzymes that remove hydrogen atoms from certain molecules and transfer them to oxygen, producing hydrogen peroxide. In the liver detoxify alcohol and other harmful compounds by transferring hydrogen from the poisons to oxygen.14
8290536082NucleusContains most of the genes in a eukaryotic cell and are only found in the eukaryotic cell, This is the central and most important part of the cell15
8290536083NucleoidA region that is not bounded by a membrane, it contains all or most of the genetic material and is largely composed of DNA16
8290536084CytosolSemifluid, jellylike substances in which sub-cellular components are suspended17
8290536085Plasma membraneFunctions as a passage of enough oxygen, nutrients, and wastes to service the entire cell and are also known as the cell membrane18
8290536086ChromosomesStructures that carry the genetic information which is DNA19
8290536087Ribosomesbinds messenger RNA and transfer RNA to synthesize polypeptides and proteins.20
8290536088Eukaryotic CellMost of the DNA is an organelle called the nucleus, which is bounded by a double membrane and they contain membrane bound organelles21
8290536089Prokaryotic CellNo nucleus, DNA is concentrated in the nucleoid and they do not contain membrane bound organelles22
8290536090Both Prokaryotes and EukaryotesBoth have cell membrane, ribosomes and cytoplasm23
8290536091Surface Area to Volume RatioCells are small because as a cell increases size volume grows proportionately more than its surface area and the plasma membrane only allows a limited amount of a particular substance across per second24
8290536092Plant CellCell wall, Chloroplast, Central Vacuole, and Plasmodesmata25
8290536093Animal CellCentrosome with centrioles, Microvilli, Lysosome and Flagellum26
8290536094Endomembrane SystemIncludes the nuclear envelope, the endoplasmic reticulum, the Golgi apparatus, lysosomes, various kinds of vesicles and vacuoles and the plasma membrane.27
8290536095VesiclesA membranous sac in the cytoplasm of eukaryotic cell. Used to transport or store molecules.28
8290536096Golgi apparatusFolded membrane within the cytoplasm. Involved in the secretion and intercellular transport of a cell.Receives proteins from ER. ER makes molecules that the Golgi edits and ships elsewhere. Modifies, sorts and packages the proteins for secretion. Known as the "post office".29
8290536097Endoplasmic reticulumA network of either rough or smooth membranous tubules within the cytoplasm of a eukaryotic cell, continuous with the nuclear membrane. Usually has ribosomes attached and is involved in protein and lipid synthesis.30
8290536098Smooth ERA network of membranous tubules that regulate and release calcium ions and process toxins. Produces necessities in order for the cell to a function as a whole. Synthesizes lipids.31
8290536099Rough ERA network of membranous tubules with ribosomes attached to the surface that give it a textured look, continuous with the nuclear membrane. Involved in protein synthesis.32
8290536100LysosomesMembrane enclosed organelles that contain an array of enzymes capable of breaking down all types of polymers such as proteins, nucleic acids, carbohydrates and lipids. Acts as the digestive system of the cell. Hydrolytic enzymes (can perform hydrolysis).33
8290536101PhagocytosisThe ingestion of bacteria or other material by phagocytic vacuoles. Large particles are taken in by phagosomes and then fused with lysosomes resulting in the digestion of their contents.34
8290536102VacuolesAct as storage bubbles in both prokaryotic and eukaryotic cells. Stores food, waste (to protect from contamination) and a variety of nutrients necessary for survival. Three different types of vacuoles including the central-holds materials and wastes, contractile-expels excess liquid on contraction and food-stores food until an organism needs it.35
8290536103Cell Wallan extracellular (outside of the cell) structure of plant cells that functions to protect the plant cell, allow the plant cell to maintain its shape, and prevent the excessive uptake of water.36
8290536104ThickerThe cell wall is __________ than the cell membrane to hold up the plant cell against gravity, wind, or any other kind of force.37
8290536105CelluloseThe cell wall of plants is made up of ... ?38
8290536110Extracellular MatrixThe collection of extracellular molecules that provides structure to cells.39
8290536111Proteins CarbohydratesWhat is the Extracellular Matrix Made up of?40
8290536112CollagenThe most abundant protein found in the ECM of animal cells. It forms strong fibers outside of the cell -Only found in animal cells.41
8290536115IntegrinsSurface receptor protein that spans over the plasma membrane and binds on their cytoplasmic side to proteins attached to the cytoskeleton -Transmit signals between the extracellular matrix and the cytoskeleton -Only found in animal cells.42
8290536116Cell JunctionsThese are structures that allow neighboring cells in an animal or plant to adhere, interact and communicate via sites of direct physical contact43
8290536117Plasmodesmata-The only cell junctions within plant cells Channels through the cell walls that connect plant cells, which are membrane lined and filled with cytosol -Allow small molecules to pass from cell to cell44
8290536122Gap Junctions (communicating junctions)Animal cell junctions that function similarly to plasmodesmata in plant cells - they are membrane-lined channels that join a cell to an adjacent cell - Allows for ions, sugars, amino acids and other small molecules to pass between cells45
8290536123cytoskeletona network of fibers extending through the cytoplasm46
8290536124motor proteinscytoskeletal elements and motor proteins work together with plasma membrane molecules to allow the whole cell to move along fibers outside the cell47
8290536125microtubuleshollow rods; wall consist of 13 columns of tubular molecule (thickest component of the cytoskeleton)48
8290536126microfilamentstwo intertwined strands of actin, each a polymer of actin subunits (thinnest component of the cytoskeleton)49
8290536128centrosomea region that is located often near the nucleus50
8290536129centriolescomes in a pair inside the centrosome; each composed of 9 sets of triplet microtubules51
8290536130cilia/flagellamicrotubule containing extensions that project cells52
8290536131basal bodystructurally similar to a centriole; with microtubule triplets in a "9+0" pattern53
8290536134myosinthousand of actin filaments and thicker filaments of a motor protein, interact to cause a contraction of muscle cells54

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