Cells and Cell Structures

Quiz!!!!! 1.What are the three parts of the cell theory? 2.What are three similarities and 3 differences between prokaryotic and eukaryotic cells? 3.Why are prokaryotic cells NOT considered eukaryotic when they have ribosomes? 4.What are three organelles in a cell that have DNA? 5.Which of those organelles (from #4) are found in your cells?

Organelles Nucleus Ribosome ERs Golgi Apparatus Mitochondrion Chloroplast

Organelles Function and Location of: Vesicles, Vacuoles, Lysosomes Microfilaments, microtubules Cell membrane, cell wall What do they do and HOW do they do it? What are they made of?

Organelles Function and Location, what do they do and how do they do it: Vesicles, Vacuoles, Lysosomes Microfilaments, microtubules Cell membrane, cell wall

Organelles Function and Location, what do they do and how do they do it: Vesicles

Organelles Function and Location, what do they do and how do they do it: Vacuoles – found in plant and some animal cells Help regulate water content In plants they contain “cell sap” – water, salts, ions, sugars, oxygen, CO2, wastes, etc. In plants they can also contain pigments – flower and fruit colors

Organelles Cytoskeleton- Microfilaments – small protein filaments made of actin (also a muscle protein), structure and cell movement Microtubules – small protein tubes (made of tubulin) Determine cell shape, provide ‘tracks’ for cell organelles and vesicle movement Also used in nuclear division Intermediate filaments- filaments

Organelles Cytoskeleton- Microfilaments and Microtubules – are charged (polar!) Therefore unidirectional (things only move one way) Intermediate filaments – made of many different proteins, cell structure Non-polar, so not used to move things

Cytoskeleton

Organelles Cytoskeleton- Microfilaments, Microtubules, Intermediate filaments Can form, break down and reform quickly Changing cell ‘consistency’

Organelles Function and Location, what do they do and how do they do it: Cell membrane, cell wall Cell membrane – lipid bilayer – stops most things moving in and out Cell wall – in plants and some bacteria Rigid, gives structure and support

Phospholipid Bilayer

Organelles Function and Location, what do they do and how do they do it: Cell wall – in plants and some bacteria Rigid, gives structure and support Made of..?

Tomorrow Work in class Diagram Plant and Animal cell (NOT copy diagram out of book) Label the parts and provide their role/function in the cell 40 points EACH DIAGRAM as a LAB GRADE (good grades on these will really help you!) 28 points each for content, 12 for the quality.

Review your notes!!!!!!!!!!!!!!! Homework