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Questions and Answers
What is the currently most accepted model of enzyme flexibility?
What is the currently most accepted model of enzyme flexibility?
- Absolute specificity model
- Stereochemical specificity model
- Induced fit model (correct)
- Lock and Key model
What is the main difference between the Lock and Key model and the Induced fit model?
What is the main difference between the Lock and Key model and the Induced fit model?
- The Induced fit model is less specific
- The Induced fit model has a larger conformational change
- The Lock and Key model is more flexible
- The Lock and Key model does not allow for conformational change (correct)
What type of specificity is described by the example of glucokinase on glucose?
What type of specificity is described by the example of glucokinase on glucose?
- Structural specificity
- Stereochemical specificity
- Relative specificity
- Absolute specificity (correct)
What is the function of trypsin in terms of peptide bonds?
What is the function of trypsin in terms of peptide bonds?
What is the rate enhancement of enzyme-catalyzed reactions compared to uncatalyzed reactions?
What is the rate enhancement of enzyme-catalyzed reactions compared to uncatalyzed reactions?
What is the purpose of enzyme regulation?
What is the purpose of enzyme regulation?
Where are many enzymes localized within the cell?
Where are many enzymes localized within the cell?
What is the capability of each enzyme molecule in terms of substrate transformation?
What is the capability of each enzyme molecule in terms of substrate transformation?
What is the purpose of compartmentalization in enzyme reactions?
What is the purpose of compartmentalization in enzyme reactions?
What type of enzymes add or remove hydrogen atoms?
What type of enzymes add or remove hydrogen atoms?
What is the function of dehydrogenase enzymes?
What is the function of dehydrogenase enzymes?
What is the function of kinases?
What is the function of kinases?
What is the function of hydrolases?
What is the function of hydrolases?
What is the function of lyases?
What is the function of lyases?
What is the function of isomerases?
What is the function of isomerases?
What is the function of ligases?
What is the function of ligases?
What is the primary nature of all enzymes?
What is the primary nature of all enzymes?
Which substance accelerates the rate of chemical reactions without being consumed?
Which substance accelerates the rate of chemical reactions without being consumed?
What is the molecule that the enzyme acts upon called?
What is the molecule that the enzyme acts upon called?
Which of the following is a correct example of an enzyme nomenclature by adding 'ase' after the name of the substrate?
Which of the following is a correct example of an enzyme nomenclature by adding 'ase' after the name of the substrate?
Which enzyme action is correctly described in its name?
Which enzyme action is correctly described in its name?
Which vitamin is associated with coenzyme TPP?
Which vitamin is associated with coenzyme TPP?
What are the variant forms of enzymes called that catalyze the same chemical reaction but differ in properties?
What are the variant forms of enzymes called that catalyze the same chemical reaction but differ in properties?
Which model suggests that the enzyme has a perfect conformation to bind the substrate?
Which model suggests that the enzyme has a perfect conformation to bind the substrate?
What does an enzyme do to the activation energy of a reaction?
What does an enzyme do to the activation energy of a reaction?
Which of the following is NOT affected by the presence of an enzyme in a reaction?
Which of the following is NOT affected by the presence of an enzyme in a reaction?
In the Michaelis-Menten model, what does 'E' stand for?
In the Michaelis-Menten model, what does 'E' stand for?
What does a small Km indicate about substrate binding?
What does a small Km indicate about substrate binding?
In the steady-state assumption, what remains constant over time?
In the steady-state assumption, what remains constant over time?
Which rate constant is associated with the formation of the product in the Michaelis-Menten model?
Which rate constant is associated with the formation of the product in the Michaelis-Menten model?
What happens to enzyme activity as substrate concentration increases to high levels?
What happens to enzyme activity as substrate concentration increases to high levels?
What is the term used to define the maximum rate of an enzyme-catalyzed reaction?
What is the term used to define the maximum rate of an enzyme-catalyzed reaction?
What does the term $V_{max}$ denote in enzyme kinetics?
What does the term $V_{max}$ denote in enzyme kinetics?
At what substrate concentration is the reaction velocity ($V_0$) equal to half of $V_{max}$?
At what substrate concentration is the reaction velocity ($V_0$) equal to half of $V_{max}$?
What is defined as the number of substrate molecules converted to product per enzyme molecule per second?
What is defined as the number of substrate molecules converted to product per enzyme molecule per second?
What describes the steady state in enzyme kinetics?
What describes the steady state in enzyme kinetics?
Which equation transformed gives a linear relationship useful for data presentation?
Which equation transformed gives a linear relationship useful for data presentation?
What does the $K_M$ value represent?
What does the $K_M$ value represent?
At very high substrate concentrations, $V_0$ is approximately equal to what value?
At very high substrate concentrations, $V_0$ is approximately equal to what value?
What term describes when the ratio of products to reactants becomes constant?
What term describes when the ratio of products to reactants becomes constant?
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