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Key Area 1.4
Revision for Key area 1.5 Proteins and Enzymes
| Question | Answer |
|---|---|
| Name the sub units which make up all proteins | Amino Acids |
| Name all 5 categories of proteins | Structural Hormones Antibodies Receptors Enzymes (SHARE) |
| State the function of Enzymes | Catalyse biological reactions |
| State the function of antibodies | Part of immune systems which helps fight infection |
| The chemicals that enzymes act upon are called ... | substrates |
| The chemicals produced by the action of an enzymes are called ... | products |
| Substrates bind to which part of the enzyme? | Active site |
| How are enzymes specific | The shape of an enzyme's active site is complementary to the shape of its specific substrate or substrates |
| What are optimum conditions? | The conditions under which a particular enzyme is most active are called the optimum conditions. |
| Name 2 conditions where enzymes have an optimum | Temperature and pH |
| Describe the rate of an enzyme at a low temperature/below the optimum | At low temperatures enzyme activity is low but increases as it approaches the optimum temperature |
| Describe the rate of an enzyme at a low temperature/below the optimum | Rate decreases until the enzyme is denatured |
| What is denaturation? | At high temperatures the shape of the enzyme is altered so that it is no longer complementary to its specific substrate. This is irreversible. |
| Describe enzyme activity at a pH which is not the optimum | As the pH value is increased above or decreased below the optimum pH the enzyme activity decreases. |
Created by:
MissBryce
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