Question

How many classes of enzymes are there? What are they?

• A. 6; dehydrogenase, oxidoreductase, tranferase, hydrolases, lyases, isomerase.
• B. 6; dehydrogenase, oxidoreductase, tranferase, hydrolases, lyases, ligases.
• C. 6; dehydrogenase, tranferase, hydrolases, lyases, isomerases, ligases.
• D. 6; hydrogenase, tranferase, hydrolases, lyases, isomerases, ligases.

Answer 1

The correct option is C 6; dehydrogenase, tranferase, hydrolases, lyases, isomerases, ligases.

There are 6 classes of enzymes:

• Oxidoreductase/dehydrogenase: Enzymes which catalyse oxidoreduction between two substrates.
• Transferase: Enzymes catalysing a transfer of a group between a pair of substrates.
• Hydrolases: Enzymes catalysing hydrolysis.
• Lyases: Enzymes that catalyse removal of groups from substrates.
• Isomerase: Enzymes catalysing inter-conversion of optical, geometric or positional isomers.
• Ligases: Enzymes catalysing the linking together of two compounds.