What are the 3 central principles of the Cell Theory?

� Support Structure/Boundaries � Transportation system � Main office � Assembly line � Packaging � Maintenance workers � Storage � Power supply

� Does a cell need: �  Boundaries?

�  Transportation system?

�  Main office?

�  Assembly line?

�  Packaging?

�  Maintenance workers?

�  Storage?

�  Power Supply?

�  Cell Membrane �  Regulates what enters and leaves cell

�  Provides protection and

support

�  Cell Wall �  Provides protection and support/structure

�  Cytoskeleton �  Helps maintain shape

�  Cell movement and

transport

�  Nucleus �  Controls most cellular processes

�  Contains the hereditary

information (DNA)

�  Cytoplasm �  Material inside the cell membrane (fluid space)

�  Endoplasmic Reticulum �  Assembles membrane parts (Smooth)

�  Modifies proteins (Rough)

�  Ribosomes �  Site of protein assembly

�  Golgi Apparatus �  Modify proteins (attach carbohydrates and proteins)

�  Lysosomes �  Break down macromolecules

�  Vacuole �  Saclike structure used for storage

�  Mitochondria �  Transforms food into useable cell energy

�  Two membranes (inner and outer)

�  Has its own DNA

�  Chloroplast �  Transforms solar energy into “food”

�  Two membranes (inner and

outer)

�  Has its own DNA

Which is the plant cell and which is the animal cell? How do you know?

�  What do we call the organelle which houses most of the cell’s DNA?

�  Which two organelles have their own DNA? �  What theory explains why they have their own DNA?

�  What are the two main functions of the cytoskeleton?