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

OrganellesFunction 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?

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

OrganellesFunction and Location, what do they do and how do they do it:• Vesicles

OrganellesFunction 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

OrganellesCytoskeleton-•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

OrganellesCytoskeleton-•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

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

OrganellesFunction 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

OrganellesFunction 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