Biology

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Water structure
Water is formed of two hydrogen and One oxygen in a triangular shape and so the oxygen attracts the electron of hydrogen toward itself giving it a partial negative charge and oxygen a partial positive. This means that water has polar bonds.
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H-bonds of water
Due to the polarity of the water molecule, the partially positive H is able to form weak bonds (relative to covalent) with a neighboring molecules partially negative oxygen.
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Properties of water
Less dense than its solid form. High Specific heat capacity. Present naturally in all three states. Transparent. Cohesion. Good Solvent. Immiscible with hydrophobic molecules. High latent heat of evaporation. Buffer.
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High SHC
Cells heat up and cool down slowley enabling it tomaitain a stable temperature.
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Cohesion
Generates surface tension due to the formation of H-bonds generating surface tension helping in capilary uptake.
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Good Solvent
ionic substances split up and are then surrounded by a shell of oriented water molecules. Carbon containing molecules with ionised groups (-COO and -NH) are solable as they for h-Bonds
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High latent heat of evaporation
evaporation of water has a strong cooling effect and so less water is required to loose alot of heat.
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Buffer
Water is capable of accepting and donating protons and so is called a buffer.
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Property of Carbon
Its a small atom but is able to form 4 strong, stable covalent bonds in a tetrahedral shape.due to the repulsion of the bonds.
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Carbohydrates
Largest famalies of organic compunds
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Simple sugars
glucose. fructose. ribose
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Disaccharides
two simple sugars chemically combined together. Sucrose, lactose, maltose
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Polysaccharides
starch, glycogen and cellulose
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Other cards in this set

Card 2

Front

Due to the polarity of the water molecule, the partially positive H is able to form weak bonds (relative to covalent) with a neighboring molecules partially negative oxygen.

Back

H-bonds of water

Card 3

Front

Less dense than its solid form. High Specific heat capacity. Present naturally in all three states. Transparent. Cohesion. Good Solvent. Immiscible with hydrophobic molecules. High latent heat of evaporation. Buffer.

Back

Preview of the back of card 3

Card 4

Front

Cells heat up and cool down slowley enabling it tomaitain a stable temperature.

Back

Preview of the back of card 4

Card 5

Front

Generates surface tension due to the formation of H-bonds generating surface tension helping in capilary uptake.

Back

Preview of the back of card 5
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