Introduction to General, Organic and Biochemistry
11th Edition
ISBN: 9781285869759
Author: Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher: Cengage Learning
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Question
Chapter 23, Problem 23.42P
Interpretation Introduction
Interpretation:
The reason why formerly known glutamate-pyruvate transaminase (GPT) has been now named alanine aminotransferase (ALT) is to be determined.
Concept Introduction:
GPT enzyme is found in liver, body fluids and tissues. GPT enzyme belongs to transaminases which catalyze the reactions involving nitrogenous group transfer.
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Chapter 23 Solutions
Introduction to General, Organic and Biochemistry
Ch. 23 - What is the difference between a catalyst and an...Ch. 23 - What are ribozymes made of?Ch. 23 - Would a lipase hydrolyze two triglycerides, one...Ch. 23 - Compare the activation energy in uncatalyzed...Ch. 23 - Prob. 23.5PCh. 23 - Prob. 23.6PCh. 23 - Prob. 23.7PCh. 23 - Monoamine oxidases are important enzymes in brain...Ch. 23 - Prob. 23.9PCh. 23 - 0 What kind of reaction does each of the following...
Ch. 23 - Prob. 23.11PCh. 23 - Prob. 23.12PCh. 23 - 3 What is the difference between reversible and...Ch. 23 - Prob. 23.14PCh. 23 - 5 At a very low concentration of a certain...Ch. 23 - 6 If we wish to double the rate of an...Ch. 23 - 7 A bacterial enzyme has the following...Ch. 23 - 8 The optimal temperature for the action of...Ch. 23 - 9 The activity of pepsin was measured at various...Ch. 23 - Prob. 23.20PCh. 23 - Prob. 23.21PCh. 23 - Prob. 23.22PCh. 23 - Prob. 23.23PCh. 23 - 4 What kind of chemical reaction occurs most...Ch. 23 - 5 Which of the following is a correct statement...Ch. 23 - Prob. 23.26PCh. 23 - 7 Enzymes are long protein chains, usually...Ch. 23 - Prob. 23.28PCh. 23 - Prob. 23.29PCh. 23 - 0 Can the product of a reaction that is part of a...Ch. 23 - 1 What is the difference between a zymogen and a...Ch. 23 - 2 The enzyme trypsin is synthesized by the body in...Ch. 23 - Prob. 23.33PCh. 23 - Prob. 23.34PCh. 23 - Prob. 23.35PCh. 23 - Prob. 23.36PCh. 23 - Prob. 23.37PCh. 23 - Prob. 23.38PCh. 23 - 9 The enzyme phosphofructokinase (PFK) (Chapter...Ch. 23 - Prob. 23.40PCh. 23 - 1 After a heart attack, the levels of certain...Ch. 23 - Prob. 23.42PCh. 23 - Prob. 23.43PCh. 23 - Prob. 23.44PCh. 23 - 5 Chemists who have been exposed for years to or...Ch. 23 - 6 Which enzyme preparation is given to patients...Ch. 23 - 7 Chymotrypsm is secreted by the pancreas and...Ch. 23 - 8 Explain why transition-state analogs are potent...Ch. 23 - Prob. 23.49PCh. 23 - 0 Explain the relationship between...Ch. 23 - 1 (Chemical Connections 23A) Acetylcholine causes...Ch. 23 - Prob. 23.52PCh. 23 - Prob. 23.53PCh. 23 - Prob. 23.54PCh. 23 - Prob. 23.55PCh. 23 - 6 (Chemical Connections 23C) What role does Mn2+...Ch. 23 - 7 (Chemical Connections 23C) Which amino acids of...Ch. 23 - 8 (Chemical Connections 23D) What is the strategy...Ch. 23 - 9 (Chemical Connections 23D) Why did scientists...Ch. 23 - Prob. 23.60PCh. 23 - Prob. 23.61PCh. 23 - Prob. 23.62PCh. 23 - 3 (Chemical Connections 23E) What is the...Ch. 23 - Prob. 23.64PCh. 23 - Prob. 23.65PCh. 23 - Prob. 23.66PCh. 23 - Prob. 23.67PCh. 23 - Prob. 23.68PCh. 23 - Prob. 23.69PCh. 23 - Prob. 23.70PCh. 23 - 1 Food can be preserved by inactivation of enzymes...Ch. 23 - Prob. 23.72PCh. 23 - 3 Would you expect to find active digestive...Ch. 23 - Prob. 23.74PCh. 23 - Prob. 23.75PCh. 23 - Prob. 23.76PCh. 23 - 7 An enzyme has the following pH dependence: At...Ch. 23 - Prob. 23.78PCh. 23 - Prob. 23.79PCh. 23 - 0 Nerve gases operate by forming covalent bonds at...Ch. 23 - 1 What would be the appropriate name for an enzyme...Ch. 23 - Prob. 23.82PCh. 23 - 3 A liver enzyme is made of four subunits: 2A and...Ch. 23 - Prob. 23.84PCh. 23 - Prob. 23.85PCh. 23 - Prob. 23.86PCh. 23 - Prob. 23.87PCh. 23 - Prob. 23.88PCh. 23 - Prob. 23.89PCh. 23 - Prob. 23.90PCh. 23 - Prob. 23.91P
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- Describe the importance of zymogens in the body. Give an example of an enzyme that has a zymogen.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 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
- What 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_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_forwardWhat is the general role of enzymes in the human body?arrow_forward
- Why does the body need so many different enzymes?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_forwardLook at Table 20.4 and identify the proteolytic enzyme that begins protein digestion in the stomach. Does this name use an EC name ending?arrow_forward
- What is an enzyme turnover number?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_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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