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Biology vocabulary Ch 1 and 2

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Question
Answer
independent variable   the variable deliberatly changed.  
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dependent variable   the variable kept the same throughout the whole process.  
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constant   .  
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control   the group everything is compared to.  
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ionic bonds   atoms/molecules gain or lose electrons.  
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covelant bonds   two or more atoms share electrons.  
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atom   the smallest unit of an element that maintains the properties of that element.  
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molecule   the smallest unit of a substance that keeps all of the physical and chemical properties of the substance.  
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compound   a substance made of atoms of two or more different elements joined by chemical means.  
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element   a substance that cannot be seperated or broken down into simpler substances by chemical means.  
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electron   negative, around the nucleus.  
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neutron   neutral, around nucleus.  
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proton   positive, around nucleus.  
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carb   Lugol's Iodine, Benedict's, simple sugars, provide us with energy, bread pasta.  
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protein   Biuret's, amino acid, catalysts transport movement protection immune growth, meat eggs.  
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lipid   Sudan III, fatty acids and glycerol, energy storage and cell structure, oils butter.  
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nucleic acid   nucleotides, direct all cell processes, DNA RNA.  
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acids   pH of 0-7.  
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bases   pH of 7-14.  
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organic molecules   macromolecule and biomolecule. A large molecule made up of many smaller molecules.  
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Enzymes   enzymes are catalysts, which are substances that reduce the activation energy of a chemical reaction.  
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enzyme: substrate:   toothpick-ase:toothpick.  
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