Term
what type of enzyme is chymotrypsin?
mettaloprotease
serine protease
aspartyl protease
cysteine protease
histidine protease |
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Definition
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Term
Sarin is a nerve gas that attcks the enzyme acetylcholinesterase. it is structurally related to the molecule DIPF, which is used as an irreversible inhibitor of enzymes. with which amino acid do sarin and DIPF react with?
methionine, tryptophan, serine, histidine or cysteine? |
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Definition
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Term
what types of inhibitors are useful for mapping enzyme active sites?
non-competitive
competitve
affinity labels
group-specific reagents
suicide inhibitors |
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Definition
| affinity labels, group-specific reagents and suicide inhibitors |
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Term
| what does the catalytic triad found in many protease enzymes do? |
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Definition
| it provides a reaction site that undergoes both acid-base and covalent catalysis during the cleavage of peptide bonds in the substrate |
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Term
| if the plot of the reaction rate of an enzyme against substrate concentration produces a sigmoidal curve, then the enzyme is said to be what type of enzyme? |
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Definition
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Term
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Definition
| enzymes that have the same function but different properties and are encoded by different genes |
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Term
zymogens are:
inactive enzymes
fibrous proteins involved in blood clotting
highly active proteases
coenzymes
protease inhibitors |
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Definition
| they are inactive enzymes |
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Term
which of the following are mechainsm for the regulation of enzyme activity?
alkylation
phosphorylation
thermal activation
feedback inhibition
proteolytic cleavage |
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Definition
feedback inhibition
proteolytic cleavage
and phosphorylation
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Term
true or false?
one of the effects of glycogen phosphorylation is to alter the net charge of the protein? |
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Definition
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