| A | B |
|---|
| metabolism | the summ of all the chemical processes taht use of release energy in an organism |
| activation energy | amount of energy needed to start a chemical reaction |
| enzyme | protein that acts as a catalyst for a bio-chemical reaction |
| catalyst | material that speeds up a chemical reaction without being used itself |
| substrate | molecule on which an enzyme acts during a chemical reaction |
| active site | pocket formed in the folds of an enzyme and to which a substrate or substrates binds; site of the reaction catalyzed by the enzyme |
| ATP | adenosine triphosphate;molecule used by cells to deliver energy for chemical reactions |
| photosynthesis | process by which organisms use the energy of light to convert inorganic molecules into organic molecules |
| cellular respiration | process by which living things obtain energy from the bonds of food molecules |
| pigment | molecule that absorbs and reflects different colors of light |
| chlorophyll | the major pigment in plants tht helps gather energy for photosynthesis |
| glycolysis | process that breaks down glucose in a cell's cytoplasm and releases a small amount of energy |
| oxidative respiration | series of chemical reactions that occur in mitochondria, and the process by which cells get most of their energy |
| pyruvic acid | three-carbon organic compound; two molecules result from the splitting of a molecule of glucose during glycolysis |
| fermentation | the incomplete breakdown of organic compounds in the absence of oxygen |
| feedback inhibition | slowing or stopping of an early reaction in a series of biochemical reactions when levels of the end product becomes high |
