| Question | Answer |
|---|---|
| What is a catalyst? | A substance that decreases the activation energy needed to start a chemical reaction and, as a result, also increases the rate of the chemical reaction. |
| Once a chemical reaction starts, can it continue by itself and it will go at a certain rate? | Yes, it will (activation energy). |
| Where do the chemical reactions happen for a organism? | It has to take place at a organisms body temperature. |
| What are Enzymes? | They are catalysts for chemical reactions in a living thing (lower activation level). |
| Do enzymes effect the equilibrium? | No, they do not effect the equilibrium. |
| What is passive transport? | The movement of molecules across a cell membrane without energy input from the cell. |
| What is Diffusion? | The movement of molecules in a fluid or gas from a region of higher concentration to a region of lower concentration. |
| What is a concentration gradient? | The difference in the concentration of a substance from one location to another. |
| What is osmosis? | Water molecules move across a semipermeable membrane from an area of higher water concentration to an area of lower concentration. |
| What is a isotonic Solution? | Has a solute concentration equal to the concentration inside the cell. |
| What is a hypotonic solution? | Has a solute concentration lower than the solute concentration inside the cell. |
| What is facilitated diffusion? | Diffusion of molecules across a membrane through transport proteins. |
| Because hypotonic solutions have lower concentration, what does this mean? | This means water molecules are more concentrated outside the cell than the inside. |
| What does pressure exerted on the cell wall by fluid inside the central vacuole provide? | Provides structural support for each cell and for the plant as a whole. |
| What kind of adaptions do cells have/do? | They can remove excess water. |
| Can a catalyst increase the rate of a chemical reaction? | Yes, They can. |
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