bio 2

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  • Created by: xopriya
  • Created on: 29-11-18 19:57
lock and key model vs induced fit model?
LK= active site shape is rigid, only exactly complementary substrates can bind to form ES complexes. IF= active site changes shape, substrate binds to active site, it changes shape so the substrate fits exactly forming an ES complex
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affect of substrate concentration on enzyme activity?
increase substrate concentration, increases chance of successful collisions, increase chance of forming an ES complex, increase rate of reaction. this continues until all the enzyme's active sites are full
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affect of enzyme concentration on enzyme activity?
increase enzyme concentration, increases chance of successful collisions, increase chance of forming an ES complex, increases rate of reaction. this continues until all the substrates are used up= maximum rate of reaction
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affect of temperature on enzyme activity?
as temperature increases, KE increases, molecules move faster, increased chance of successful collisions & forming ES complexes. increases rate of reaction, after optimum the bonds in tertiary structure break and active site loses shape, substrate is
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affect of pH on enzyme activity?
if we change pH away from the optimum, the bonds in the tertiary structure break and the active site loses shape. ES complexes are no longer formed and the enzyme is denatured.
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competitive inhibitors
a substance with a similar shape to the substrate and a complementary shape to the enzyme's active site binds to the active site, blocking it & preventing ES complexes from forming.
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non-competitive inhibitors?
a substance that binds to another site on the enzyme other than the active site causes the active site to chance shape, so less ES complexes formed
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what are the 3 types of lipids?
triglycerides, phospholipids & cholesterol
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structure of triglycerides?
made of 1 glycerol & 3 fatty acids / joined by condensation reaction / bond is COOC / 2 types: saturated & unsaturated
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saturated vs unsaturated fat?
saturated= has no carbon double bonds / unsaturated= has carbon double bonds
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structure of phospholipid?
made of 1 glycerol, 2 fatty acids & 1 phosphate / phosphate forms hydrophilic head, fatty acids form hydrophobic tails / forms phospholipid bilayer, basic structure of membranes
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what is ATP?
adenosine triphosphate / made from 1 adenosine and 3 phosphates
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what makes ATP a good deliverer of energy?
immediate source- only need to break one weak bond / manageable source- releases small amount of energy
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affect of substrate concentration on enzyme activity?

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increase substrate concentration, increases chance of successful collisions, increase chance of forming an ES complex, increase rate of reaction. this continues until all the enzyme's active sites are full

Card 3

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affect of enzyme concentration on enzyme activity?

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Card 4

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affect of temperature on enzyme activity?

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Card 5

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affect of pH on enzyme activity?

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