Grade 9 Biology: Cells Allie Steele Next Slide Cell Structure and Function Cell Wall Nucleus Cytoplasm Endoplasmic Reticulum RibosomesMitochondriaGolgi.

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Presentation transcript:

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

End Of Lesson Click here to return to title pagehere