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Cell Structure & Function
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Cell Theory All living things are made up of cells.
Cells are the smallest working units of all living things. All cells come from preexisting cells through cell division.
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Definition of Cell A cell is the smallest unit that is capable of performing life functions.
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Examples of Cells Amoeba Proteus Plant Stem Bacteria Red Blood Cell
Nerve Cell
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Prokaryotic Eukaryotic
Two Types of Cells Prokaryotic Eukaryotic
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Prokaryotic Do not have structures surrounded by membranes
Few internal structures One-celled organisms, Bacteria
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Eukaryotic Contain organelles surrounded by membranes
Most living organisms Plant Animal
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“Typical” Animal Cell
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“Typical” Plant Cell
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Cell Parts Organelles
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Surrounding the Cell
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Cell Membrane Outer membrane of cell that controls movement in and out of the cell Double layer
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Cell Wall Most commonly found in plant cells & bacteria
Supports & protects cells
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Inside the Cell
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Nucleus Directs cell activities
Separated from cytoplasm by nuclear membrane Contains genetic material - DNA
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Nuclear Membrane Surrounds nucleus Made of two layers
Openings allow material to enter and leave nucleus
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Chromosomes In nucleus Made of DNA
Contain instructions for traits & characteristics
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Nucleolus Inside nucleus Contains RNA to build proteins
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Cytoplasm Gel-like mixture Surrounded by cell membrane
Contains hereditary material
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Endoplasmic Reticulum
Moves materials around in cell Smooth type: lacks ribosomes Rough type (pictured): ribosomes embedded in surface
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Ribosomes Each cell contains thousands Make proteins
Found on ribosomes & floating throughout the cell
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Mitochondria Produces energy through chemical reactions – breaking down fats & carbohydrates Controls level of water and other materials in cell Recycles and decomposes proteins, fats, and carbohydrates
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Golgi Bodies Protein 'packaging plant' Move materials within the cell
Move materials out of the cell
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Lysosome Digestive 'plant' for proteins, fats, and carbohydrates
Transports undigested material to cell membrane for removal Cell breaks down if lysosome explodes
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Vacuoles Membrane-bound sacs for storage, digestion, and waste removal
Contains water solution Help plants maintain shape
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Chloroplast Usually found in plant cells Contains green chlorophyll
Where photosynthesis takes place
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I CAN: Examine the parts and functions of animal cells and plant cells
The Cell Game I CAN: Examine the parts and functions of animal cells and plant cells
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Scenario Suppose you’re a biologist during the day, but at night you have hobby: You love to play board games. A famous board game company has asked you to help with a new project. They are designing a science board game just for middle school students. The game will require answering questions about the parts of a cell to move a game piece forward.
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MS-LS1-2 Develop and use a model to describe the function of a cell as a whole and ways parts of cells contribute to the function.
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Scoring Rubric SCORE 40 The board game meets the stated requirements: one easy and one hard question with correct answers for each cell part; game board with at least five cell part drawings; and designated places for question cards and spinner. SCORE 30 The board game meets the stated requirements for a score of 4, but the student did not contribute equally (ex: missing question cards). SCORE 20 The board game meets the stated requirements for a score of 4, but the student’s questions are of poor quality, incomplete, or incorrect. SCORE 10 The board game is of poor quality and fails to meet multiple requirements, or the student contributed little to the game or questions.
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MS-LS1-2: Develop and use a model to describe the function of a cell as a whole and ways parts of cells contribute to the function SCORING RUBRIC SCORE 40 The board game meets the stated requirements: one easy and one hard question with correct answers for each cell part; game board with at least five cell part drawings; and designated places for question cards and spinner. SCORE 30 The board game meets the stated requirements for a score of 4, but the student did not contribute equally. SCORE 20 The board game meets the stated requirements for a score of 4, but the student’s questions are of poor quality, incomplete, or incorrect. SCORE 10 The board game is of poor quality and fails to meet multiple requirements, or the student contributed little to the game or questions.
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