Concept explainers
(a)
Interpretation: The substrate for the enzyme, cytochrome oxidase has to be stated.
Concept introduction: The compound that acts as a catalyst for a biochemical reaction is called enzyme. The human body contains different enzymes because every reaction in a cell needs a specific enzyme.
(b)
Interpretation: The substrate for the enzyme, cis-trans isomerase has to be stated.
Concept introduction: The compound that acts as a catalyst for a biochemical reaction is called enzyme. The human body contains different enzymes because every reaction in a cell needs a specific enzyme.
(c)
Interpretation: The substrate for the enzyme, succinate dehydrogenase has to be stated.
Concept introduction: The compound that acts as a catalyst for a biochemical reaction is called enzyme. The human body contains different enzymes because every reaction in a cell needs a specific enzyme.
(d)
Interpretation: The substrate for the enzyme, lactase has to be stated.
Concept introduction: The compound that acts as a catalyst for a biochemical reaction is called enzyme. The human body contains different enzymes because every reaction in a cell needs a specific enzyme.
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- 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_forward21-52 What are the chemical and physiological functions of the COX-2 enzyme?arrow_forwardWhat type of specificity (absolute, group, linkage, or stereochemical) is associated with each of the following enzymes? a. Sucrase b. A lipase c. A decarboxylase d. L-glutamate oxidasearrow_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_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
- Describe the importance of zymogens in the body. Give an example of an enzyme that has a zymogen.arrow_forward0 What are the structural differences between vitamin C and sugars? Do these structural differences play a role in the susceptibility of this vitamin to air oxidation?arrow_forwardIdentify the enzyme needed in each of the following reactions as an isomerase, a decarboxylase, a dehydrogenase, a protease, or a phosphatase.arrow_forward
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