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| membranes only allow certain types of substances to transfer at certain rates |
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| transport against the concentration gradient, requires energy |
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| transport with the concentration gradient |
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| form of passive transport, requires aid of protein |
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Definition
| class of proteins that serve as a catalyst |
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| compound that speeds up chemical reactions without being used up |
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| the material that causes an enzyme to react |
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Definition
enzymes are very specific and have optimal activities
-optimal temperature
-optimal pH |
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