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Cards In This Set
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What is the cell theory?
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-In its modern form, the cell theory includes three principles:
-1. All organisms are composed of one or more cells
2. Cells are the smallest living things
3. Cells arise only by division of a previously existing cell
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What are the two major kinds of cells?
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-Prokaryotic Cells:
Only Bacteria Cells
Have no nucleus
-Eukaryotic Cells:
Fungi , plants , animals, protist
A nucleus is present
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What are the cell types based on structure?
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3 cell type based on structure:
1. Bacteria or Prokaryotic cell ( prokaryotes)
2. Animal cells ( eukaryotes)
3. Plant cells (eukaryotes)
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What are the General Cell Features? (What all cells have)
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 1. Cell membrane ( plasma membrane) 2. Cytoplasm 3. DNA |
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Prokaryotic Cells
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-Bacteria Cell
-Prokaryotes include bacteria and archaea
-Over 5,000 species are recognized
-Prokaryotes come in three main shapes:
---spiral
---rod
---spherical
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Prokaryote cell sturucture
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 -They lack a nucleus and organelles. |
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List of Prokaryotic cell structures
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Capsule
Cell Wall
Plasma membrane ( cell membrane)
Pilus
Flagella
DNA ( nucleoid region , bacteria chromosome)
Cytoplasm
Ribosomes
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Prokaryotic Cell: Capsule
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This is a protective layer around the bacteria. It is usually present in disease-causing bacteria.
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Prokaryotic Cell: cell wall
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There are two basic types of cell walls, Gram positive and Gram negative. The cell wall is a rigid layer that gives the bacteria protection and its shape.
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Prokaryotic Cell: Plasma Membrane
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This is a semi-permeable layer around cell
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Prokaryotic Cell: DNA
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This is where most of the bacteria's genetic information is stored.
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Prokaryotic Cell: Cytoplasm
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Liquid material inside the cell.
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Prokaryotic Cell: Ribosome
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Ribosomes are involved in making proteins.
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Prokaryotic Cell: Pilus
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Some bacteria have pili. Pili are used for adhesion to surfaces.
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Prokaryotic Cells: Flagellum
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Some bacteria have flagella so that they can move around in their environment.�
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