| A | B |
|---|
| The energy contained in food is converted to free energy by the process of | cellular respiration |
| Autotrophs are | producers |
| Energy flow in an ecosystem can be described as ___ in which energy later leaves as heat | one-way |
| Where does most of the energy contained in producers end up? | Heat |
| Organisms store energy is the form of | chemical energy |
| Chemical reactions in cells need activation energy unless the cells use | enzymes |
| The energy in an ATP molecule is released by breaking the bond between | phosphates |
| Reactions in which molecules are broken down (such as burning food) are | catabolic |
| This describes free energy | Energy available to the organism to do work |
| When a chemical reaction occurs in a cell and heat is given off | there is less free energy available to the cell |
| For enzyme activity to be high | the temperature must remain within a narrow range |
| The breakdown of sucrose into glucose is a(n) ___ reaction | Exergonic |
| Organisms found deep in the ocean obtain free energy from inorganic chemicals. They are called | Autotrophs (Chemotrophs) |
| This law states that energy cannot be created or destroyed but it can change form and be conserved. | First law of thermodynamics |
| This law states that systems tend to change in a way that increases the disorder or entropy. | Second law of thermodynamics |
| If lactase is the enzyme that works on milk sugar...milk sugar is called the | substrate |
| Cells cannot use this to store energy for the FUTURE | ATP |
| Most known enzymes are | proteins |
| Enzymes are ___ used up in a reaction | NOT |
| An enzyme's function is determined by its | physical/chemical structure |
