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AP MOD. I-chemistry
| Term | Definition |
|---|---|
| proton | positively charged particle |
| neutron | uncharged particle |
| electron | negatively charged particle |
| atomic mass | number of protons and neutrons combined |
| element | pure substance made up of one kind of atom |
| molecule | group of atoms |
| compound | substances whose molecules have more than one kind of atom |
| ionic bond | bond formed by the positve-negative attraction of two atoms |
| covalent bond | bond formed when atoms share electrons |
| dehydration synthesis | water is removed from small molecules to form larger ones |
| hydrolysis | water is added to large molecules to make smaller molecules |
| acid | pH value below 7 |
| base | pH value above 7 |
| buffers | chemicals that maitain stable pH |
| carbohydrates | organis compound,stores energy |
| monosaccharide | basic unit of carbohydrate, one sugar "simple sugar"-(glucose) |
| disaccharide | double sugar-(sucrose, lactose) |
| polysaccharide | complex carbohydrate-(glycogen) |
| lipids | fats and oils |
| triglycerides | glycerol unit with three fatty acids |
| phospholipids | phosphorus-containing unit with a head and two tails |
| cholesterol | steroid structure |
| proteins | made up of amino acids |
| structural proteins | form structures in the body |
| functional proteins | protein that regulates chemical reactions in the body |
| enzymes | help chemical reactions occur-"lock-and -key" |
| collagen | fibrous protein that holds tissues together |
| keratin | "waterproofing" fibers in outer layer of skin |
| DNA | deoxyribonucleic acid-cells "master code" |
| RNA | ribonucleic acid-"working copy" of a gene |
| ATP | transfers energy from nutrients to cellular processes. |