Biology AQA 3.1.2 Enzyme Properties

Question	Answer
Enzyme structure	Enzymes are proteins, the tertiary structure is the twisting of dna and multiple chains, this causes the active sites shape
Effect of Temperature on Enzymes	Hot: Causes enzymes to denature because an increase in kinetic energy causes bonds to break. Medium: 37oc is optimum temperature for enzyme activity. Cold: Causes Enzymes to denature, no kinetic energy so no rate of reaction
effect of Competitive inhibitors	These inhibitors have similar structure to the substrate which compliments the active site, it causes the energy to have a slower rate of reaction because more sites are filled up.
effect of non-competitive inhibitors	These attach to the enzymes at different places to the active site and causes them to lose shape so that they are not able to bind to the substrate
Effect of PH on enzymes	every enzyme has an optinum Ph. a change in Ph alters Amino chain and causes the active site to alter. A change in PH affects bonds.
Effect of Substrate concentration on Enzymes.	Low: A slow rate of reaction because not all enzyme-substrate complexes have been formed. Medium: All active sites are filled up so the rate of reaction is at its optimum. High:All the active sites are already filled up so it has no effect on the rate of reaction

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	Created by evie.daines over 10 years ago