What is the type of reaction which makes dipeptides/polypeptides?
Condensation
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What occurs during a condensation reaction?
Removal of a water molecule, makes monomers into polymers.
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What is the primary structure of an protein?
a chain/sequence of amino acids (polypeptide chain)
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What is the secondary structure of a protein?
The shape of a polypeptide chain after being bonded with hydrogen.
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What is the tertiary structure of a protein?
The bending/twisting of the polypeptide helix into a compact structure. Has 3 types of bond: disulfide, ionic and hydrogen
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What is the Quaternary structure of a protein?
A number of polypeptide chains and assosiated with a prosthetic group into a large complex protien molecule.
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What is a fibrous protein?
forms long chains which run parallel to one another.
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What is used to test for proteins?
Biurets reagent
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Using Biurets reagent, how do you know a protien is present?
A purple colour shows that there is a protien present.
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True/False: An enzyme is a globular protein .
True
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What is a catalyst?
A catalyst is used to speed up the rate of a chemical reaction.
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What is the minimum amount of energy needed to start a chemical reaction?
Activation energy
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What si the difference between the induced fit model and the lock and key model?
Induced fit - active site is more flexible and mould itself around the substrate. Lock and key - the substrate will only fit the active site of one particular enzyme.
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What are the factors that effect enzyme action?
Concentration of substrate, concentration of enzyme, temperature, pH
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Which inhibitor does not bind to the active site of an enzyme?
A non-competitive inhibitior
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What is a competitive inhibitor?
It has a similar shape to that of the substrate. This allows it to occupy the active site of an enzyme. Therefore competing with the substrate for the active site.
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Why are they called non-competitive inhibitors?
Because they do not have to compete for the active site as they bind to any part of the enzyme.
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What is the type of reaction which makes dipeptides/polypeptides?
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