AP Biology - Key Terms
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13 Terms
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Polar molecule
A neutral, or uncharged molecule that has an asymmetric internal distribution of charge, leading to partially positive and partially negative regions
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Cohesion
The attraction of molecules for other molecules of the same kind
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Adhesion
The attraction of molecules for other molecules of a different kind
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Density
The mass per unit volume of a substance
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Specific heat capacity
The amount of heat needed to raise the temperature of one gram of a substance by one degree Celsius
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Heat of vaporization
The amount of energy needed to change one gram of a liquid substance to a gas at constant temperature
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Hydroxyl
Polar
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Methyl
Nonpolar
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Carbonyl
Polar
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Carboxyl
Charged (forms R-COO^-) at the pH of most biological systems. Since carboxyl groups can release H+ into solution, they are considered acidic.
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Amino
Charged (forms R-NH3^+) at the pH of most biological systems. Since amino groups can remove H+ from solution, they are considered basic.
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Phosphate
Charged (forms R-OPO2/3^-) at the pH of most biological systems. Since phosphate groups can release H+ into solution, they are considered acidic.
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Sulfhydryl
Polar
Note 
Flashcards (21)