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How does an Electron Microscope work?
By firing a beam of electrons at the target.
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What is a Cell?
The basic unit of life.
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How does a Compound Light Microscope work?
By using a series of lenses to magnify objects in steps.
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What is a TEM mostly for?
Viewing the structures within a cell.
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What is a STM mostly for?
Using the flow of electrons to create computer images.
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What is the Nucleus?
The "brain" of a cell.
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What is the Plasma Membrane?
The flexible boundary between a cell, and its environment.
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What is Selective Permeability?
Allowing some things to pass, ant not others.
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What does a Phospholipid contain?
- -A glycerol backbone
- -Tow fatty acid chains
- -A phosphate group
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What is the Phospholipid bilayer?
Has phospholipids on both sides, and membrane proteins in the middle.
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What is the Cell Wall?
A rigid structure outside of the plasma membrane, found in plant cells.
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Whats the difference between a Prokaryote, and a Eukaryote?
Prokaryotes do not contain any membrane-bound organelles. Eukaryotes do.
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What is Chromatin?
Strands of genetic material(DNA)
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What is inside the Nucleus, and what does it do?
The Nucleolus, and it produces Ribosomes.
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What are Ribosomes?
The site where cells reproduce proteins according to the directions of DNA.
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What is Cytoplasm?
The clear, gelatinous fluid inside a cell.
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The Endoplasmic Reticulum(ER) is what?
The site of cellular chemical reactions.
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What does the Golgi Apparatus do?
Modifies proteins.
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What is a Vacuole?
Used for temporary storage of materials.
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What do Lysosomes contain?
Digestive enzymes.
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