Enzyme Function and Classification

The video tutorial explains the classification of enzymes based on the reactions they catalyze. It covers oxidoreductases, which facilitate oxidation-reduction reactions, hydrolases that perform hydrolysis, transferases that transfer functional groups, isomerases that create isomers, and the distinction between lyases and ligases. Each enzyme type is described with examples and their specific roles in biochemical processes.

What is the primary basis for classifying enzymes?

• The type of reaction they catalyze

• Their molecular weight

• The organism they are found in

• Their color

Which of the following is a function of oxido-reductases?

• Breaking down proteins

• Transferring electrons

• Joining molecules

• Forming isomers

What is a common feature of reactions catalyzed by hydrolases?

• They form new bonds

• They use water to break bonds

• They change the chirality of molecules

• They involve electron transfer

Which enzyme type is often involved in digestion by breaking down biomolecules?

• Oxido-reductases

• Isomerases

• Hydrolases

• Transferases

Which enzyme type is involved in transferring functional groups between molecules?

• Oxido-reductases

• Isomerases

• Hydrolases

• Transferases

What is the role of isomerases in biochemical reactions?

• Creating isomers

• Transferring electrons

• Joining two molecules

• Breaking down large molecules

Which of the following is an example of a transferase?

• Pepsin

• Isomerase

• Kinase

• Oxidase

Which enzyme type is responsible for non-hydrolytic cleavage of bonds?

• Ligases

• Liases

• Hydrolases

• Transferases

What is the main difference between liases and ligases?

• Both break bonds

• Liases form bonds, ligases break them

• Liases break bonds, ligases form them

• Both form bonds

What is a characteristic of reactions catalyzed by ligases?

• They create isomers

• They join two substrates together

• They transfer electrons

• They involve water to break bonds