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24 Cards in this Set
- Front
- Back
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adhesion |
The attraction among molecules of different substances |
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cohesion |
Attraction between molecules of the same substance |
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carbohydrate |
Molecules composed of carbon,hydrogen,and oxygen and they include sugar and starches. |
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solvent |
The substance that is present in the greater amount and that dissolves another substance |
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nucleic acid |
polymers that are made up of monomers called nucleotides. Two types-DNA and RNA (genetic material of organisms) |
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substrate |
The specific reactants that an enzyme acts on |
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acid |
A compound that releases a proton-a hydrogen ion (H+)-when it dissolves in water. An acid increases the concentration of H+ ions in a solution |
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Amino acids |
Molecules that contain carbon,hydrogen,oxygen,nitrogen and sometimes sulfur |
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Lipid |
nonpolar molecule that include fats, oils and cholesterol. |
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Base |
Compounds that remove H+ ions from a solution |
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exothermic |
chemical reaction which releases more energy than it absorbs. Products have a lower bond energy than the reactants |
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enzymes |
catalysts for chemical reactions in living things. They lower the activation energy and increase the rate of chemical reactions |
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Ionic bond |
formed through the electrical force between oppositely charged ions |
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Polymer |
A large molecule, or macromolecule, made of many monomers bonded together. |
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Covalent bond |
Forms when atoms share a pair of electrons |
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endothermic |
Chemical reaction absorbs more energy than it releases |
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ph scale |
The scale in which a solution’s acidity, or H+ ion concentration is measured |
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chemical reactions |
Change substances into different substances by breaking and forming chemical bonds |
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Hydrogen bond |
An attraction between a slightly positive hydrogen atom and a slightly negative atom, often oxygen or nitrogen |
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monosaccharides |
Most basic carbohydrate - simple sugars |
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Surface tension |
A measure of how difficult it is to stretch or break the surface of a liquid. Water has a high surface tension because of the hydrogen bonding surface molecules |
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Atom |
Smallest basic unit of matter |
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Monomer |
Small molecules which are subunits of a complete molecule |
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Lipid
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Nonpolar molecules that include fats oils and cholesterol
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