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M8) Enzymes
Enzymes are specific for their substrate.
| Question | Answer |
|---|---|
| Define enzyme. | A specific organic catalyst important in cell metabolism. |
| Define activation energy. | The energy required to start a chemical reaction in cells. It is lowered with the help of enzymes. |
| Define active site. | The region on an enzyme's surface where the substrate binds to in a complementary fashion. |
| Define catalyst. | A substance that increases the rate of reaction. |
| Define cofactor. | An inorganic substance that is necessary for an enzyme to function. |
| Define inhibitor. | A chemical that interferes with the catalytic action of an enzyme. |
| Define limiting factor. | Any factor which limits the rate of a chemical reaction ie. as it is increased the reaction speeds up. |
| Define specificity. | Unique binding: for example, one substrate for one enzyme, or one antibody for one antigen. |
| Define substrate. | A substance which an enzyme acts upon. |
| Define coenzyme. | An organic cofactor which is usually required in small amounts, eg. vitamins. |
| What happens to enzymes at temperatures too low below or to high above their optimum range? | Their 3D structure may be altered, leading to the denaturation of the enzyme, meaning it cannot bind to substrates and perform its function efficiently, if at all. |
Created by:
MahaliaMcD
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