Enzymes Quiz

What is the primary function of enzymes in biological systems?

• Transport oxygen in the blood

• Speed up chemical reactions

• Regulate body temperature

• Store genetic information

What is the basic structure of an enzyme?

• Enzymes are made up of simple sugars.

• Enzymes have a linear structure.

• Enzymes consist of inorganic molecules.

• Enzymes have a complex three-dimensional structure consisting of folded amino acid chains.

How do enzymes catalyze chemical reactions?

• Enzymes lower the activation energy of chemical reactions.

• Enzymes increase the activation energy of chemical reactions.

• Enzymes convert reactants into products without any energy change.

• Enzymes have no effect on the activation energy of chemical reactions.

What is the difference between competitive and non-competitive enzyme inhibition?

• Competitive enzyme inhibition occurs when a molecule binds to the active site, while non-competitive enzyme inhibition occurs when a molecule competes with the substrate for a site other than the active site.

• Competitive enzyme inhibition occurs when a molecule competes with the substrate for the active site, while non-competitive enzyme inhibition occurs when a molecule binds to a site other than the active site.

• Competitive enzyme inhibition occurs when a molecule binds to a site other than the active site, while non-competitive enzyme inhibition occurs when a molecule competes with the substrate for the active site.

• Competitive enzyme inhibition occurs when a molecule competes with the substrate for a site other than the active site, while non-competitive enzyme inhibition occurs when a molecule binds to the active site.

What is the Michaelis-Menten equation used for in enzyme kinetics?

• The Michaelis-Menten equation is used to determine the optimal pH for enzyme activity.

• The Michaelis-Menten equation is used to describe the rate of enzymatic reactions.

• The Michaelis-Menten equation is used to measure the size of an enzyme molecule.

• The Michaelis-Menten equation is used to calculate the concentration of substrate in an enzymatic reaction.

What is the turnover number of an enzyme?

• The turnover number of an enzyme is the maximum number of substrate molecules that an enzyme can convert into product per unit time when the enzyme is fully saturated with substrate.

• The turnover number of an enzyme is the total number of substrate molecules that an enzyme can convert into product per unit time when the enzyme is fully saturated with substrate.

• The turnover number of an enzyme is the average number of substrate molecules that an enzyme can convert into product per unit time when the enzyme is fully saturated with substrate.

• The turnover number of an enzyme is the minimum number of substrate molecules that an enzyme can convert into product per unit time when the enzyme is fully saturated with substrate.

What is the role of cofactors and coenzymes in enzyme function?

• Cofactors and coenzymes inhibit the catalytic activity of enzymes.

• Cofactors and coenzymes have no effect on the catalytic activity of enzymes.

• Cofactors and coenzymes are byproducts of enzyme reactions.

• Cofactors and coenzymes assist in the catalytic activity of enzymes.

What is the induced fit model of enzyme-substrate interaction?

• The induced fit model of enzyme-substrate interaction is a model that describes how enzymes and substrates form a stable complex without any conformational changes.

• The induced fit model of enzyme-substrate interaction is a model that describes how enzymes and substrates interact through a lock-and-key mechanism.

• The induced fit model of enzyme-substrate interaction is a model that describes how enzymes and substrates undergo conformational changes upon binding to each other.

• The induced fit model of enzyme-substrate interaction is a model that describes how enzymes and substrates bind to each other without any changes in their shape.

What are the factors that can affect enzyme activity?

• temperature, pH, substrate concentration, enzyme concentration, inhibitors or activators

• time, pressure, light intensity

• volume, concentration, solubility

• size, shape, color

What is the significance of enzyme specificity?

• Enzyme specificity allows enzymes to selectively bind to specific substrates and catalyze specific reactions.

• Enzyme specificity allows enzymes to bind to any substrate and catalyze any reaction.

• Enzyme specificity is not important for enzyme function.

• Enzyme specificity is determined by the pH of the environment.