*Enzyme Nomenclature* Flashcards
Wider Learning
What are the 6 major classes of enzymes?
- Oxidoreductases;
- Transferases;
- Hydrolases;
- Lysases;
- Isomerases;
- Ligases.
What is the function of an oxireductase?
Catalyses redox reactions.
What is the function of a transferase?
Catalyses transamination reactions.
What is the function of a hydrolase?
Catalyses hydrolysis and condensation reactions.
What is the function of a lysase?
Catalyses for the addition of a group.
What is the function of an isomerase?
Catalyses for the reaction of an isomer.
What is the function of a ligase?
Catalyses bond formations.
How many names do enzymes have?
Multiple names for each enzyme.
By what names are enzymes usually referred to by?
Their trivial names.
Why may an enzyme be referred to by their trivial names rather than their systematic names?
The systematic names are usually far too complex to remember so the trivial names are used.
How is a systematic name decided for an enzyme?
It is usually reflective of the nature of the substrate and type of reaction.
Explain the use of trivial and systematic names for an enzyme, using the example of human saliva.
The enzyme has two trivial names; ptyalin and salivary amylase. These are used as the systematic name is very long and complex; alpha-1,4-glucan-4-glucanohydrolase.
Which type of enzyme is:
- ethanol dehydrogenase.
Oxidoreductase.
Which type of enzyme is:
- transaminase.
Transferase.
Which type of enzyme is:
- lactase.
Hydrolase.
