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Grade 9 Biology: Cells Allie SteeleNext Slide

Cell WallOuter layer of plant cellsRigid & strongMade of celluloseFunctions:Support (grow tall)Protectionallows H2O, O2, CO2 to diffuse in & out of cell

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IncorrectThe nucleolus is the mini nucleus or the inner part of the nucleus which is responsible for making ribosomesClick to go back

Nucleus Large, ovalMay contain 1 or more nucleoliHolds DNAFunctions:Controls cell activitiesContains the hereditary material of the cell

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CytoplasmClear, thick, jellylike material (cytosol)Organelles found inside cell membraneContains the cytoskeleton fibersFunctions:Supports and protects cell organellesMenu

Endoplasmic Reticulum Network of tubes or membranesSmooth w/o ribosomesRough with embedded ribosomesConnects to nuclear envelope & cell membraneFunctions:Carries materials through cellAids in making proteins

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Golgi Apparatus Stacks of flattened sacsFunctions:Have a cis & trans faceModify proteins made by the cellsPackage & export proteins

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RibosomesSmall bodies free or attached to ERMade of rRNA & proteinFunctions:Synthesizes proteinsMenu

MitochondriaPeanut shapedDouble membraneOuter membrane smoothInner membrane folded into cristaeFunctions:Breaks down sugar (glucose) molecules to release energySite of aerobic cellular respiration

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