Enzyme Functions and Classifications

The video tutorial explains enzymes as biocatalysts that speed up chemical reactions in the body. It covers the history of enzyme naming, highlighting the use of the 'ASE' suffix, and discusses the challenges faced before a standardized naming system was established. The video then delves into the classification of enzymes into six classes: oxidoreductases, transferases, hydrolases, lyases, isomerases, and ligases, providing examples and explaining the reactions they catalyze.

What is the primary role of enzymes in the body?

• To store energy

• To act as a structural component

• To slow down chemical reactions

• To speed up chemical reactions

What suffix is commonly found at the end of enzyme names?

• ITE

• OSE

• ASE

• ENE

Why was the early enzyme naming system considered problematic?

• It did not indicate the reaction catalyzed

• It was too complex

• It was not widely accepted

• It was too simple

Which organization established the classification of enzymes into six classes?

• Royal Society of Chemistry

• American Chemical Society

• International Union of Biochemistry

• World Health Organization

What type of reactions do oxidoreductases catalyze?

• Hydrolysis

• Oxidation and reduction

• Ligating

• Isomerization

Which enzyme class is responsible for transferring functional groups?

• Transferases

• Lyases

• Ligases

• Hydrolases

What is the main function of hydrolases?

• To join molecules

• To transfer electrons

• To rearrange atoms

• To break down molecules using water

Which class of enzymes removes groups from substrates without hydrolysis or oxidation?

• Ligases

• Lyases

• Transferases

• Isomerases

What do isomerases do?

• They join two molecules

• They break down molecules

• They rearrange atoms within a molecule

• They transfer functional groups

Which enzyme class is involved in linking two molecules using ATP?

• Ligases

• Transferases

• Hydrolases

• Oxidoreductases