| Hint | word |
| CR is the breakdown of ___ ___. | |
| CR is a ______ (energy releasing) process. | |
| CR is responsible for the synthesis of ____, the energy currency of the cell. | |
| CR is a ____ pathway. | |
| CR in the absence of oxygen is called? | |
| How does the breakdown of glucose release its potential energy? | |
| In oxidation, a substance _____ ______. | |
| In reduction, a substance ____ ______. | |
| The electron donor is called the ____ ____. | |
| The electron acceptor is called the ____ ___. | |