investigating what is happening inside of the cell
TRANSCRIPT
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Investigating What is Happening Inside of the Cell
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The cell is…Basic unit of structure and function
Smallest unit of living material that can carry out all of the activities necessary for life
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2 Distinct Types of Cells:1.Prokaryotic Cells
• Example: Bacteria-
Archaea/Eubacteria
2. Eukaryotic Cells• Examples: Animals
Plants Fungi Protists
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All Cells Have:1. Plasma
Membrane/Cell memebrane (barrier)
2. DNA-containing Region
3.Cytoplasm4.Ribosomes
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Differences?
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1. PROKARYOTIC CELLSSmallerLess complexityNo nucleusNo membrane-bound organelles
Contains 1 continuous circular DNA called a nucleoid
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PROKARYOTIC CELLS pg. 55 in bat book
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EUKARYOTIC CELLSLargerComplexHas membrane-bound structures called organelles; “little organs” each with a function
Nucleus is the large defining feature
2 types: plant and animal cells
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EUKARYOTIC CELLS
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Left-side Activity
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Diagram
Compare and Contrast Prokaryotic and Eukaryotic cell
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Daily Entry
1. What are the two types of cells?2. What are the 3 things that all cells have?3. What do prokaryotic cells have instead of a
nucleus?4. What do prokaryotic cells lack?5. Is bacteria a prokaryotic or eukaryotic
cell?
Reminders:
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2 Types of Eukaryotic Cells
1. Plant Cell
2. Animal Cell
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Page 175 in your textbookThe exact same diagrams Please label and notice differences Put into your spiral when finished
Complete your compare and contrast of plant vs. animal
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Organellesa specialized subunit within a cell that has a
specific function“little organs”All organelles work together to benefit the
cell as a whole
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Organelles found in Eukaryotic CellsNucleusCell membrane
Cell wallRibosomeEndoplasmic Reticulum (smooth and rough)
Golgi BodiesChloroplastsMitochondriaCentriolesVacuolesCytoplasm
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Plasma Membrane(Cell Membrane)
Semi-permeable barrier
Called the lipid bilayer or “fluid-mosaic model”
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Made of phospholipidsHydrophilic head (1): “water loving”
Face towards aqueous part Hydrophobic tails (2): “water hating”
Face towards inside, between the inner and outer surfaces
Forms a hydrophobic region (or core)
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CytoplasmExtracellular space inside the cellFills the empty space of the cellGel-like substance comprised inside cell
membraneMaintains shape and support for organelles
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Nucleus• Hereditary control
• Contains the cell’s DNAControls the activity of the
organelles
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Ribosomes• Make protein• The most numerous organelles in almost all cells
• Assemble enzymes• Float free in cytoplasm or attached to ER
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Endoplasmic ReticulumSmooth ER:Few or no ribosomesPathwayProduce and store lipids
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Rough ER:Covered with ribosomes
Directs the flow of proteins
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Golgi BodiesProcesses, packages, and secretes proteins
Encloses proteins in a vesicle to send out of cell
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MitochondriaEnergy center or “powerhouse” of the cell
Turns food into energyMost numerous in cells that use a lot of energy (liver, muscle cells) energy = ATP
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VacuolesTemporary storage of materials
Stores water, sap, etcBoth animal (small) and plant cells have
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ChloroplastsPLANTS ONLYUses light energy to create food (glucose)
Photosynthesis (in plants)
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What do plants have that most animals don’t?Cell Wall
PLANTS ONLYProtective outer coatingMade of celluloseProvides support for the cell
We are not talking about the obvious here…we are talking about cells!
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Structure Prokaryotic
Cell
Eukaryotic
Plant Cell
Eukaryotic
Animal CellCell Wall No
Plasma Membrane
Organelles No
Nucleus No
Centrioles No No
Review
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Organelle ChartUse book to complete chartEach organelle has it own section in the bookPage 176Read and determine the overall function of
that organelle
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Label Organelles pg. 175
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Daily Entry1. Why is the plasma membrane a
very important structure for all cells?2. Which organelle is like the cells
brain?3. What makes the rough
endoplasmic reticulum rough?4. Which organelle provides the cell
with energy (ATP)?5. Which organelle is like the postal
service?
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Label Organelles
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Create a Venn Diagram Compare and contrast Plant and Animal cells.