Biological molecules - topic 1.4
- Created by: georgia_thompson
- Created on: 09-12-17 14:38
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- Topic 1.4
- How enzymes work? - 1.4.2
- The reaction has to get over the 'engery hill' - activation energy
- Enzymes form a complex with the substrate
- Catabolic reaction:substrate + enzyme = enzyme/substrate complex =enzyme + products
- Enzymes form a complex with the substrate
- The 'lock - and key hypothesis'
- Induced fit hypothesis
- Initial rate of reaction - is affected by temperature , PH and concentration
- Enzymes change only the rate of reaction
- Evidence for the relationship betweeb structure and functions of enzymes
- Enzymes speed up reactions to such an extent
- Molecular activity - the number of substrate molecules transformed per minute by a single enzyme molecule
- Temperature coefficient
- Molecular activity - the number of substrate molecules transformed per minute by a single enzyme molecule
- Enzymes are very specific to the reaction that they catalyse
- The number of substrate molecules present affects of an enzyme-catalysed reaction
- Enzymes speed up reactions to such an extent
- The reaction has to get over the 'engery hill' - activation energy
- Enzyme inhibition
- Enzyme inhibitors
- Reversible inhibitiob
- Two forms of reversible inhibition
- Competitive inhibition
- similiar shape to substrate molecule
- Non-competitive inhibition
- may form a complex with either the enzyme itself or the enzyme/substrate complex
- Competitive inhibition
- Two forms of reversible inhibition
- Irreversible inhibition
- End - prodiuct inhibition: is a control system in many metabolic pathways in which an enzyme at the beginning of the pathway is inhibited by one of the end products of the reaction
- Reversible inhibitiob
- Enzyme inhibitors
- How enzymes work? - 1.4.2
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