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Module 7 Vocabulay
| Question | Answer |
|---|---|
| Cell theory | the theory that states that all living things are made of one or more cells, the cell is the smallest unit of life, and all new cells come from preexisting cells |
| Macromolecule | substance that forms from joining many small molecules together |
| nucleic acid | a macromolecule that forms when long chains of molecules called nucleotides join together |
| pretein | a long chain of amino acid molcules : contains, hydrogen, oxygen, nitrogen, and sometimes sulfur |
| lipid | a large macromolecule that does not dissolve in water |
| carbohydrate | a macromolecule made up of one or more sugar molecules, which are composed of carbon, hydrogen, and oxygen: usually the body's major source of energy |
| cell membrane | a flexible covering that protects the inside of a cell from the environment outsde the cell |
| osmosis | the diffusion of water molecules only through a membrane |
| facilitated diffusion | the process by which molecules pass through a cell membrane using special proteins called transport proteins |
| active transport | the movement of subtances through a cell membrane using the cell's energy |
| endocytosis | the process during which a cell takes in a subtance by surrounding it with the cell membrane |
| exocytosis | the process during which a cell"s vesicle release their contents outside the cell |
| cellular respiration | a series of chemial reactions that convert the energy in food molecules into a usable form of energy called ATP. |
| glycolysis | a process by which glucose, a sugar, is broken down into smaller molecules |
| fermentation | a reaction that eukaryotic and prokaryotic cells can use to obtain energy from food when oxygen levels are low |
| photosynthesis | a series of chemical reactions that convert light energy, water, and CO2 into the food - energy molecule glucose andgive off oxygen |