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.
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GENERAL,ORGANIC,+BIO.CHEM.-MINDTAP
- Based 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_forwardExplain how the pasteurization of milk utilizes one of the factors that influence enzyme activity.arrow_forwardThe human body has an average pH of about 7 and a temperature of about 37C. Use graphs to illustrate enzyme activity in the human body as a function of the following: a. Substrate concentration b. Enzyme concentration c. pH include pH optimum value d. Temperature include temperature optimum valuearrow_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_forwardWhat is the general role of enzymes in the human body?arrow_forwardThe site on an enzyme molecule that does the catalytic work is called the: a. binding site. b. allosteric site. c. lock. d. active site.arrow_forward
- What is an enzyme turnover number?arrow_forwardDraw a graph that shows the effect of increasing substrate concentration on the rate of an enzyme-catalyzed reaction (at constant temperature, pH, and enzyme concentration).arrow_forwardIndicate 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_forward
- Which 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_forwardWhat observations may be used in experiments to determine enzyme activity?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_forward
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