| A | B |
|---|
| cellulose | polysaccharide found only in plants that helps support a plant by giving it strength and rigidity |
| diffusion | process by which molecules of a substance movefrom areaas of higher concentration to lower concentration |
| osmosis | diffusion of water molecules through a selectively permeable membrane from and area of high water concentration to low water concentration |
| active transport | energy requiring process that moves material across a cell membrane against a concentration difference |
| selectively permeable | description of a biological membrane that allwos some substances to pass through but not others |
| cell theory | understanding that all living things are composed of cells and that all cells come from preexisting cells |
| mitochondria | organelle that changes chemical energy stored in food into compounds that can be used by the cell |
| chloroplast | organelle that converts sunlight into chemical energy in plants |
| glycolysis | production of ATP by the conversion of glucose to pyruvic acid |
| lipid | waxy or oily organic compound that stores energy in its bonds |
| protein | complex polymer of amino acids that builds and repairs cells |
| carbohydrate | organic compound containing carbon, hydrogen and oxygen in a 1:2:1 ratio; human body's main source of energy |
| enzyme | one of a number of special protein catalysts contained in living organisms |
| atom | smallest particle of matter that can exist and still have the properties of a particular kind of matter |
| vacuole | organelle that stores materials such as water, salts, proteins and carbohydrates |
| respiration | process that involves oxygen and breaks down food molecules to release energy |
| fermentation | process that enables cells to carry out energy production in the absence of oxygen; break down glucose and release of energy in which organic substances are the final electron acceptors |
