Concept explainers
(a)
Interpretation: The validation of the given pairing of concept related to regulation of enzyme activity has to be stated.
Concept introduction: The regulation of enzyme activity is very important within a cell. There are three mechanisms associated with the regulation of enzyme activity: 1. feedback control, 2. proteolytic enzymes and zymogens, and 3. Covalent modification.
(b)
Interpretation: The validation of the given pairing of concept related to regulation of enzyme activity has to be stated.
Concept introduction: The regulation of enzyme activity is very important within a cell. There are three mechanisms associated with the regulation of enzyme activity: 1. feedback control, 2. proteolytic enzymes and zymogens, and 3. Covalent modification.
(c)
Interpretation: The validation of the given pairing of concept related to regulation of enzyme activity has to be stated.
Concept introduction: The regulation of enzyme activity is very important within a cell. There are three mechanisms associated with the regulation of enzyme activity: 1. feedback control, 2. proteolytic enzymes and zymogens, and 3. Covalent modification.
(d)
Interpretation: The validation of the given pairing of concept related to regulation of enzyme activity has to be stated.
Concept introduction: The regulation of enzyme activity is very important within a cell. There are three mechanisms associated with the regulation of enzyme activity: 1. feedback control, 2. proteolytic enzymes and zymogens, and 3. Covalent modification.
Want to see the full answer?
Check out a sample textbook solutionChapter 21 Solutions
General, Organic, and Biological Chemistry
- What observations may be used in experiments to determine enzyme activity?arrow_forwardDescribe the importance of zymogens in the body. Give an example of an enzyme that has a zymogen.arrow_forwardBased on the graphical information in Problem 21-41 about enzymes A and B indicate whether the enzyme activity of enzyme B increases or decreases when the following changes in reaction conditions are made. a. pH decreases from 7.6 to 7.2 b. pH increases from 7.2 to 7.4 c. temperature decreases from 37.8C to 37.6C d. temperature increases from 38.2C to 38.4Carrow_forward
- The process by which an enzyme acts on the substrate can be described by the: a. lock-and-key model. b. enzyme-and-substrate model. c. enzyme folding model. d. catalytic model.arrow_forwardExplain how the pasteurization of milk utilizes one of the factors that influence enzyme activity.arrow_forwardWhat is an enzyme turnover number?arrow_forward
- What is the general role of enzymes in the human body?arrow_forwardWhich of the following is not a characteristic of enzymes? a. They are macromolecules. b. They act on substances. c. They are phospholipids. d. They initiate and decelerate chemical reactions. e. They act as catalysts.arrow_forwardBased on the graphical information in Problem 21-41 about enzymes A and B a. What is the optimum pH for enzyme B? b. What is the optimum temperature for enzyme A? c. Which enzyme has the greater activity at a pH of 7.2? d. Which enzyme has the greater activity at a temperature of 37.2C?arrow_forward
- Indicate whether each of the following statements concerning different types of enzyme inhibitors is true or false. a. A reversible competitive inhibitor temporarily blocks an enzymes active site. b. A reversible noncompetitive inhibitor permanently changes the shape of an enzymes active site. c. An irreversible inhibitor temporarily changes the shape of an enzymes active site. d. Insecticides are examples of reversible noncompetitive inhibitors.arrow_forwardSome enzymes consist of protein plus another component. Which of the terms cofactor or coenzyme correctly describes each of the following nonprotein components? a. an inorganic ion b. a nonspecific component c. an organic material d. nicotinic acid.arrow_forwardIndicate whether each of the following statements concerning enzymes and their mode of action are true or false. a. According to the induced-fit model of enzyme action, a substrate must be changed into a cofactor before a chemical reaction occurs. b. The active site of an enzyme is the location within the enzyme where catalysis takes place. c. The protein portion of a conjugated enzyme can accommodate several substrates at the same time. d. Simple enzymes do not have active sites, whereas conjugated enzymes do have active sites.arrow_forward
- General, Organic, and Biological ChemistryChemistryISBN:9781285853918Author:H. Stephen StokerPublisher:Cengage LearningOrganic And Biological ChemistryChemistryISBN:9781305081079Author:STOKER, H. Stephen (howard Stephen)Publisher:Cengage Learning,Chemistry for Today: General, Organic, and Bioche...ChemistryISBN:9781305960060Author:Spencer L. Seager, Michael R. Slabaugh, Maren S. HansenPublisher:Cengage Learning
- Introductory Chemistry: An Active Learning Approa...ChemistryISBN:9781305079250Author:Mark S. Cracolice, Ed PetersPublisher:Cengage LearningWorld of Chemistry, 3rd editionChemistryISBN:9781133109655Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCostePublisher:Brooks / Cole / Cengage LearningWorld of ChemistryChemistryISBN:9780618562763Author:Steven S. ZumdahlPublisher:Houghton Mifflin College Div