Science Quiz
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15 terms
Terms | Definitions |
|---|---|
 organic compounds | most compounds that contain carbon |
| inorganic compounds | compounds that do not contain carbon (few exceptions like carbon dioxide) |
| proteins | large organic compounds made of carbon, hydrogen, oxygen, nitrogen and occasionally sulfur |
| amino acids | smaller molecules-can become thousands of different proteins when combined |
| carbohydrates | energy-rich, organic compounds made from carbon, hydrogen and oxygen |
| lipids | energy-rich organic compounds, such as fats, oils, and waxes, that are made of carbon, hydrogen, and oxygen |
| nucleic acids | large, organic molecules made of hydrogen, nitrogen, carbon, and phosphorus |
| enzymes | protein substances that speed up chemical reactions. |
| selectively permeable | A property of cell membranes that allows some substances to pass through, while others cannot. |
| permeable | to pass through |
| diffusion | process by which molecules tend to move from an area where they are more concentrated to an area where they are less concentrated |
| osmosis | diffusion of water molecules through a selectively permeable membrane |
| passive transport | The movement of materials through a cell membrane without using energy |
| active transport | the movement of materials through a cell membrane using energy |
| engulfing | another form of active transport in which the cell surrounds a particle and forms a vacuole within the cell |
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