More AS Biology F211 and F212

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Magnification
Using lenses to make an image appear larger than reality
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Resolution
The ability of the eyes or an optical instrument to distinguish between two close points without them merging
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SEM Properties
3D image, scans the surface of the object
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TEM Properties
2D image, scans through the object
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Electron Microscope Magnification and Resolution
500,000x and 1nm
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Light Microscope Magnification and Resolution
2000x and 200nm
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Extrinsic proteins are usually for:
Cell recognition, cell adhesion and hormone binding sites
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Amylose Structure
Alpha glucose chain, 1,4 glycosidic links, coil/helix shape
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Amylopectin Structure
Straight chain of alpha glucose, 1,6 glycosidic links, branched
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Cellulose
Beta glucose chain, has both glycosidic links and hydrogen bonds
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Collagen Structure
Fibrous protein, triple helix shape, insoluble in water, primary structure contains repeated glycine
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Define Primary Structure
The order/sequence of amino acids
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Define Secondary Structure
The folding of the protein to form alpha helices, beta pleated sheets and random coils
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Define Tertiary Structure
Interactions between R groups causing bonds to form such as disulphide bridges, ionic bonds and hydrophobic interactions
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Keratin Structure/ Properties
Fibrous protein, insoluble in water, contains cysteine - disulphide bridges form
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Other cards in this set

Card 2

Front

Resolution

Back

The ability of the eyes or an optical instrument to distinguish between two close points without them merging

Card 3

Front

SEM Properties

Back

Preview of the front of card 3

Card 4

Front

TEM Properties

Back

Preview of the front of card 4

Card 5

Front

Electron Microscope Magnification and Resolution

Back

Preview of the front of card 5
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