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Question
Which of the following enzyme(s) is/are an exception to the rules laid down for naming of enzymes?
Which of the following enzyme(s) is/are an exception to the rules laid down for naming of enzymes?
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Solution
The correct option is D Trypsin
Name of the enzyme includes the type of the reaction catalysed, name of the substrate, suffix -ase. Eg:- ATPase (enzyme that breaks down ATP). ATP synthase (enzyme that synthesizes ATP). Exceptions to namings- pepsin, trypsin. International commission on enzymes laid down rules in 1961 for naming enzymes. It is based on the types of chemical reactions catalysed.
Enzymes can be classified into oxidoreductases/dehydrogenases (catalyse oxidation reduction reactions), transferases (catalyses transfer of groups from one molecule to another), hydrolases (catalyses breaking of bonds by addition of water), lyases (catalyses breaking of bonds without using water), isomerases (catalyses the switch between isomers), ligases (catalyses the joining of molecules of forming of bonds).
Name of the enzyme includes the type of the reaction catalysed, name of the substrate, suffix -ase. Eg:- ATPase (enzyme that breaks down ATP). ATP synthase (enzyme that synthesizes ATP). Exceptions to namings- pepsin, trypsin. International commission on enzymes laid down rules in 1961 for naming enzymes. It is based on the types of chemical reactions catalysed.
Enzymes can be classified into oxidoreductases/dehydrogenases (catalyse oxidation reduction reactions), transferases (catalyses transfer of groups from one molecule to another), hydrolases (catalyses breaking of bonds by addition of water), lyases (catalyses breaking of bonds without using water), isomerases (catalyses the switch between isomers), ligases (catalyses the joining of molecules of forming of bonds).
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