Quiz on Enzymes

What is the main function of enzymes in the body?

• Produce hormones

• Regulate body temperature

• Store energy

• Speed up chemical reactions

What is the active site of an enzyme?

• The area of the enzyme that regulates temperature

• The part of the enzyme that stores energy

• The section of the enzyme that produces hormones

• The region of the enzyme where substrates bind and react

Which model explains enzyme specificity by stating that the substrate fits perfectly into the active site of the enzyme?

• Non-competitive inhibition model

• Competitive inhibition model

• Induced fit model

• Lock-and-key model

What is the role of cofactors in enzyme activity?

• Produce energy

• Support biochemical reactions

• Store genetic information

• Regulate enzyme temperature

Which type of enzyme inhibition involves the inhibitor binding to a site other than the active site, causing a change in enzyme structure?

• Competitive inhibition

• Irreversible inhibition

• Non-competitive inhibition

• Uncompetitive inhibition

What is the effect of increasing substrate concentration on enzyme velocity?

• Stops the enzyme from functioning

• Decreases velocity continuously

• Initially increases velocity, then reaches a maximum

• Has no effect on velocity

What is the primary function of reversible enzyme inhibitors?

• Form irreversible enzyme-inhibitor complexes

• Destroy enzyme structure

• Covalently modify enzymes

• Inactivate enzymes through noncovalent interactions

What is the purpose of enzyme regulation?

• Control the rates of reactions

• Increase enzyme activity

• Change enzyme structure

• Prevent enzyme-substrate binding

What is the optimal pH for most enzymes to work efficiently?

• High pH

• Highly acidic pH

• Low pH

• Neutral pH 7.4

What is the turnover number of an enzyme?

• Number of enzymes in a reaction

• Number of cofactors used

• Number of substrate molecules converted to product per enzyme molecule per second

• Number of products formed