Concept explainers
(a)
Interpretation:
The group of enzyme to which phosphoglyceromutase belongs is to be determined.
Concept introduction:
The phosphoglyceromutase enzyme catalyzes the reaction of internal transferring of phosphate group from the third carbon to second carbon. Due to this 3-phosphoglycerate gets converted into 2-phosphoglycerate.
(b)
Interpretation:
The group of enzyme to which urease belongs is to be determined.
Concept Introduction:
A cytosolic enzyme called urease catalyzes the hydrolysis reaction of urea into carbon dioxide and ammonia.
(c)
Interpretation:
The group of enzyme to which succinate dehydrogenase belongs is to be determined.
Concept Introduction:
Succinate dehydrogenase enzyme participates in citric acid cycle as well as electron transport chain. It catalyzes the reaction involving conversion of succinate to fumarate.
(d)
Interpretation:
The group of enzyme to which aspartase belongs is to be determined.
Concept Introduction:
In lyases catalyzed reactions, water is either removed for the formation of a double bond or added across the double bond.
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Introduction to General, Organic and Biochemistry
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- 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_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_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
- Describe the difference between graphs showing temperature versus reaction rate for an enzyme-catalyzed reaction and an uncatalyzed reaction.arrow_forwardTo which of the six major classes of enzymes does the enzyme that catalyzes each of the following reactions belong? a. A cis double bond is converted to a trans double bond. a. An alcohol is dehydrated to form a compound with a double bond. b. An amino group is transferred from one substrate to another. c. An ester linkage is hydrolyzed.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
- Write a brief description of the relationships among each of the following groups of terms or phrases. Answers to the Concept-Linking Exercises are given at the end of the chapter. Enzyme, enzyme substrate, active site, induced fit modelarrow_forwardWhen handling or storing solutions of enzymes, the pH is usually kept near 7.0. Explain why.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
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