Question

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Class 11 Important Questions for Biology –

What are different classes of enzymes?

Explain any two with the type of reaction they catalyse.?​

Answer 1

Explanation:

Classes of Enzymes

Class

Chemical Reaction Catalyzed

Sample Enzymes

Oxidoreductase

Oxidation-reduction in which oxygen and hydrogen are gained or lost

Cytochrome oxidase, lactate dehydrogenase

Transferase

Transfer of functional groups, such as an amino group, acetyl group, or phosphate group

Acetate kinase, alanine deaminase

Hydrolase

Hydrolysis (addition of water)

Lipase, sucrase

Lyase

Removal of groups of atoms without hydrolysis

Oxalate decarboxylase, isocitrate lyase

Isomerase

Rearrangement of atoms within a molecule

Glucose-phosphate isomerase, alanine racemase

Ligase

Joining of two molecules (using energy usually derived from the breakdown of ATP)

Acetyl-CoA synthetase, DNA ligase

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Answer 2

Enzymes can be defined as biological polymers that catalyse biochemical reactions . .. .. ...

According to the International Union of Biochemists (IUB) , enzymes are classified into six functional classes and are classified based on the type of reaction in which they are used to catalyse . The six types of enzymes are oxidoreductase , hydrolases , transferases , lyases , isomerases , ligases .

Oxidoreductases catalyses the oxidation reaction where the electrons tend to travel from one form of the molecule to other .

Hydrolases are hydrolytic enzymes which catalyses the hydrolysis reaction by adding water to cleave the bond and hydrolyze it .

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