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| a combination of substances in which the individual substances do not change or combine chemically but instead retain their own individual properties |
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| compounds that always contain hydrogen and carbon carbohydrates lipids proteins and nucleic acids are orgainc compounds found in living things |
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| compound such as h2o that is made from elements other than carbon and whose atoms usually can be arranged in only one structure |
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| a type of protein that regulates ll chemical reactions in cells |
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| movement of substances through a cell membrane without the use of cellular energy |
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| energy requiring process in which transport proteins bind with particles and move them through a cell membrane |
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| a type of passive transport in cells which molecules move from areas where there are fewer of them |
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| occurs when molecules of one substance are spread evenly throughout another substance |
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| a type of passive transport that occurs when water diffuses through a cell membrane |
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| process by which plants and many other producers use light energy to produce a simple sugar from carbon dioxide and water and give of oxygen |
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