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science ch 2-2
| Question | Answer |
|---|---|
| Element | A type of matter in which all the atoms are the same ;cannot be broken down into simpler substances |
| Atom | The smallest unit of an element |
| Compound | Two or more elements that are chemically combined |
| Molecule | The smallest unit of most compound |
| organic compound | A compound that contains carbon |
| Inorganic Compound | A compound that does not contain carbon |
| Protein | Large organic molecules made of carbon, hydrogen and oxygen and sometimes sulfur they are needed for tissue growth and repair and play a part in chemical within the cells |
| Lipids | Energy-rich organic compounds, such as fats,oils and waxes that are made of carbon,hydrogen and oxygen |
| Amino Acids | Small units that are linked together chemically to form larger protein molecules |
| Enzyme | A protein that speeds up chemical reactions in the bodies of living things |
| Carbohydrate | Energy-rich organic compounds,such as sugars and starches that are made up of the elements carbon, hydrogen,oxygen.(They provide the raw materials to make parts of cells |
| Nucleic acids | A very large organic molecule made of carbon, oxygen,hydrogen,nitrogen and phosphorus that contain instructions that cells need to carry out all the function of life |
| DNA | Deoxyribonucleic acid;the genetic material that carries information about an organism and is passed from parent to off spring |
| RNA | Ribonucleic acid a nucleic acid that plays an important role in the production of proteins. |
| Selectively Permeable | A property of cell membranes that allows some substances to pass through, while others cannot |
| Diffusion | The process by which molecules move from an area in which there are highly concentrated molecules ton an area in which they are less concentrated molecules. |
| Osmosis | The 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 |
| Photosynthesis | The process by which a cell captures the energy in sun and uses it to make food |
| Pigment | Colored chemical compounds that absorb light |
| Chlorophyll | The pigments found in the chloroplasts of plants is chloropyll |
| Stomata | Small openings under the side of the leaves that allows carbon dioxide to come in and release oxygen |
| Respiration | The process by which cells break down simple food molecules to release the energy they contain |
| Fermentation | The process by which cells break down molecules to release energy without using oxygen |
| Cell cycle | The regular sequence of growth and development that cells undergo |
| Interphase | The stage of the cell cycle that takes place before cell division occurs ; during this stage ,the cell grows copies its DNA, and prepares to divide |
| Prophase |
Created by:
broncos
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