Concept explainers
(a)
Interpretation: Among the given pairs, the enzyme which would be more limited in its catalytic scope has to be predicted.
Concept introduction: Linkage specificity involves the catalysis of particular type of
(b)
Interpretation: Among the given pairs, the enzyme which would be more limited in its catalytic scope has to be predicted.
Concept introduction: Group specificity involves catalysis of molecules which contains specific
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Chapter 21 Solutions
Bundle: General, Organic, and Biological Chemistry, 7th + OWLv2 Quick Prep for General Chemistry, 4 terms (24 months) Printed Access Card
- Describe the importance of zymogens in the body. Give an example of an enzyme that has a zymogen.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_forwardIn the multienzyme sequence shown below, molecules of D are able to fit to the enzyme E1 and prevent the conversion of A to B. What is this action of E called? AE1BE2CE3D a. effector inhibition b. allosteric inhibition c. feedback inhibition d. competitive inhibition by nonproductarrow_forward
- 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_forwardThe 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_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
- Draw 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_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_forwardTo which of the six major classes of enzymes does the enzyme that catalyzes each of the following reactions belong? a. An L isomer is converted to a D isomer. a. A phosphate group is transferred from one substrate to another. b. An amide linkage is hydrolyzed. c. Hydrolysis of a carbohydrate to monosaccharides occurs.arrow_forward
- Based 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_forwardWhen handling or storing solutions of enzymes, the pH is usually kept near 7.0. Explain why.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
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