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nicotinamide nucleotidesthese coenzymes are derived from the vitamin niacin they are of two types nicotinamide adenine dinucleotide
hydrogen transferring coenzymes this group consists of three important coenzymes all of which assist different enzymes in
as coenzymes participate in a variety of functions they can be classified broadly into two groupsi hydrogen transferring coenzymes andii
role of enzymes in metabolismenzymes require a non-protein part for their optimal activity which may be a coenzyme or a metal ion
explain noncompetitive inhibitora noncompetitive inhibitor can combine with either the free enzyme or the enzyme- substrate complex
noncompetitive inhibition in this type of inhibition the inhibitor binds at a site on the enzyme other than
enzyme inhibitionenzymes are often inhibited by the presence of suitable inhibitors much of current drug therapy is based on this
oxidationsome enzymes which have the sulfhydryl -sh group in the catalytic site are very sensitive to oxidation due to oxidation of
activatorsactivity of many enzymes is influenced by certain ions called as activators large number of enzymes such as hexokinase that
what is enzyme kineticsthe study of the rate at which an enzyme works is called enzyme
fischer s template or lock and key modelaccording to this model the catalytic site of the enzyme has a proper conformation compatible to a specific
models for enzyme-substrate es complex formationthere are two popular models to explain the enzyme-substrate interaction these area fischers
group specificitysome enzymes prefer a specific functional group to be presenton the substrate molecules example- alcohol dehydrogenase
bond specificitysome enzymes act on a particular bond glycosidic peptide ester etc examples pepsin
reaction specificitysome enzymes catalyze only one reaction acting on a specific substrate example urease and
isomerasesthese enzymes code ec 5 catalyze geometric or structural changes within a molecule according to the
explain lyasesthese enzymes code ec 4 cleave c-c c-o c-n and other bonds by elimination forming double bonds or conversely adding groups
hydrolyases these enzymes code ec 3 catalyze the hydrolytic cleavage of c-o c-n c-c and some other bonds including phosphoric anhydride bonds
enzyme proteins that act as catalysts speeding the rate at which biochemical reactions proceed but not altering the direction
explain unresorbable barriers - root perforation mta exhabits excellent tissue biocompatible non resorbable barrier and restorative material it
explain the resorbable barriers - root perforation it is successfully control internal bleeding through cronal access it is intended to forced in
define the materials used in perforation repair1- barrier material restorable barrier un restorable barrier 2- function of barriers provide
explain the failure to management of ledgeapical transportation or perforation movement of the physiological foramen to a new iatrogenic
explain the management of middle - third perforation same to coronal one-third perforation except defects located more deeper from the access cavity
explain the management of furcal perforation 1st isolate the perforation site if the perforation is mechanical accidentally occurred a- it is