2. Grade 9 Biology: Cells Allie Steele Next Slide

3. Cell Structure and Function Cell Wall Nucleus Cytoplasm Endoplasmic Reticulum RibosomesMitochondriaGolgi ApparatusNucleolus Click here for Mini QuizQuiz

4. 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

5. Nucleus Large, oval May contain 1 or more nucleoli Holds DNA Functions: Controls cell activities Contains the hereditary material of the cell Menu

6. Cytoplasm Clear, thick, jellylike material (cytosol) Organelles found inside cell membrane Contains the cytoskeleton fibers Functions: Supports and protects cell organelles Menu

7. 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

8. Ribosomes Small bodies free or attached to ER Made of rRNA & protein Functions: Synthesizes proteins Menu

9. 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

10. Golgi Apparatus Stacks of flattened sacs Functions: Have a cis & trans face Modify proteins made by the cells Package & export proteins Menu

11. Nucleolus Found inside the cell's nucleus May have more than one Disappear during cell division Functions: Make ribosomes Menu

12. Mini Quiz Which cell part holds the DNA of the cell? 1.Nucleus 2.Nucleolus 3.Golgi Apparatus

13. Correct! The nucleus holds the DNA of the cell and also holds all heredity material of the cell. Click To Continue

14. Incorrect The nucleolus is the “mini nucleus” or the inner part of the nucleus which is responsible for making ribosomes Click to go back

15. Incorrect The Golgi Apparatus modifies proteins and then packages and exports them throughout the cell Click to go back

16. End Of Lesson Click here to return to title pagehere