Grade 9 Biology: Cells Allie Steele Next Slide
Cell Structure and Function Cell Wall Nucleus Cytoplasm Endoplasmic Reticulum RibosomesMitochondriaGolgi ApparatusNucleolus Click here for Mini QuizQuiz
Cell Wall Outer layer of plant cells Rigid & strong Made of cellulose Functions: Support (grow tall) Protection allows H 2 O, O 2, CO 2 to diffuse in & out of cell Menu
Nucleus Large, oval May contain 1 or more nucleoli Holds DNA Functions: Controls cell activities Contains the hereditary material of the cell Menu
Cytoplasm Clear, thick, jellylike material (cytosol) Organelles found inside cell membrane Contains the cytoskeleton fibers Functions: Supports and protects cell organelles Menu
Endoplasmic Reticulum Network of tubes or membranes Smooth w/o ribosomes Rough with embedded ribosomes Connects to nuclear envelope & cell membrane Functions: Carries materials through cell Aids in making proteins Menu
Ribosomes Small bodies free or attached to ER Made of rRNA & protein Functions: Synthesizes proteins Menu
Mitochondria Peanut shaped Double membrane Outer membrane smooth Inner membrane folded into cristae Functions: Breaks down sugar (glucose) molecules to release energy Site of aerobic cellular respiration Menu
Golgi Apparatus Stacks of flattened sacs Functions: Have a cis & trans face Modify proteins made by the cells Package & export proteins Menu
Nucleolus Found inside the cell's nucleus May have more than one Disappear during cell division Functions: Make ribosomes Menu
Mini Quiz Which cell part holds the DNA of the cell? 1.Nucleus 2.Nucleolus 3.Golgi Apparatus
Correct! The nucleus holds the DNA of the cell and also holds all heredity material of the cell. Click To Continue
Incorrect The nucleolus is the “mini nucleus” or the inner part of the nucleus which is responsible for making ribosomes Click to go back
Incorrect The Golgi Apparatus modifies proteins and then packages and exports them throughout the cell Click to go back
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