Question

Basically how many types of enzymes have been recognised by the International Union of Biochemistry?

• A. 4
• B. 5
• C. 6
• D. 8

Answer 1

The correct option is C 6

The enzymes are classified into six major classes. A brief about each class has been summarised in the following table.

$\begin{array}{ccc}\text{Sl.No.}& \text{Class}& \text{Function}\\ 1& \text{Oxidoreductase}& \text{This class of enzymes catalyses reactions that involve electron transfer}\\ 2& \text{Transferase}& \text{Enzymes that catalyse reactions which involve the transfer of groups of atoms are a member of this class}\\ 3& \text{Hydrolase}& \text{Enzymes that catalyse the hydrolysis reaction are a member of this class}\\ 4& \text{Lyase}& \text{Enzymes that catalyse the removal of groups from substrates by mechanisms other than hydrolysis leaving double bonds}\\ 5& \text{Isomerase}& \text{This class of enzymes are involved in reactions that convert a substance into its isomer}\\ 6& \text{Ligase}& \text{Ligases are enzymes that catalyse reactions which involve the formation of bonds/linking together of two compounds}\end{array}$