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Questions and Answers
Which model describes an enzyme having a pre-determined shape for the active site, where only substrates of specific shape can bind?
Which model describes an enzyme having a pre-determined shape for the active site, where only substrates of specific shape can bind?
- Sequential model
- Lock-and-key model (correct)
- Allosteric model
- Induced fit model
What type of specificity involves an enzyme distinguishing between stereoisomers?
What type of specificity involves an enzyme distinguishing between stereoisomers?
- Substrate specificity
- Group specificity
- Stereochemical specificity (correct)
- Linkage specificity
Which enzyme cleaves amino acids one at a time from the carboxyl end of a peptide chain?
Which enzyme cleaves amino acids one at a time from the carboxyl end of a peptide chain?
- Carboxypeptidase (correct)
- Phosphatase
- Oxidase
- Isomerase
What is required for the formation of an enzyme-substrate complex?
What is required for the formation of an enzyme-substrate complex?
Which type of enzyme specificity involves hydrolyzing phosphate-ester bonds in all types of phosphate esters?
Which type of enzyme specificity involves hydrolyzing phosphate-ester bonds in all types of phosphate esters?
What is the purpose of regulating enzyme activity within a cell?
What is the purpose of regulating enzyme activity within a cell?
In reversible noncompetitive inhibition, where does the inhibitor bind?
In reversible noncompetitive inhibition, where does the inhibitor bind?
Why does increasing the concentration of substrate not completely overcome noncompetitive inhibition?
Why does increasing the concentration of substrate not completely overcome noncompetitive inhibition?
Which ions are examples of noncompetitive inhibitors mentioned in the text?
Which ions are examples of noncompetitive inhibitors mentioned in the text?
What is one reason for turning off an enzyme within a cell?
What is one reason for turning off an enzyme within a cell?
Which general mechanism is associated with feedback control in enzyme regulation?
Which general mechanism is associated with feedback control in enzyme regulation?
What is a zymogen?
What is a zymogen?
Which of the following statements about allosteric enzymes is true?
Which of the following statements about allosteric enzymes is true?
What is the role of regulators in allosteric enzymes?
What is the role of regulators in allosteric enzymes?
What happens when a regulator binds to an allosteric enzyme?
What happens when a regulator binds to an allosteric enzyme?
What is a proteolytic enzyme?
What is a proteolytic enzyme?
What is the function of pepsinogen?
What is the function of pepsinogen?
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