Introduction To General, Organic, And Biochemistry
12th Edition
ISBN: 9781337571357
Author: Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher: Cengage Learning
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Chapter 22, Problem 16P
8 The optimal temperature for the action of lactate dehydrogenase is 36°C. It is irreversibly inactivated at 85°C, but a yeast containing this enzyme can survive for months at —10°C. Explain how this can happen.
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Chapter 22 Solutions
Introduction To General, Organic, And Biochemistry
Ch. 22.1 - Prob. 22.1QCCh. 22.2 - Prob. 22.2QCCh. 22.3 - Prob. 22.3QCCh. 22.4 - Which of the following is true regarding enzymes?...Ch. 22.5 - Match the description of the enzyme process with...Ch. 22 - What is the difference between a catalyst and an...Ch. 22 - What are ribozymes made of?Ch. 22 - Would a lipase hydrolyze two triglycerides, one...Ch. 22 - Compare the activation energy in uncatalyzed...Ch. 22 - Prob. 5P
Ch. 22 - Prob. 6PCh. 22 - Prob. 7PCh. 22 - Monoamine oxidases are important enzymes in brain...Ch. 22 - Prob. 9PCh. 22 - 0 What kind of reaction does each of the following...Ch. 22 - Prob. 11PCh. 22 - In most enzyme-catalyzed reactions, the rate of...Ch. 22 - 5 At a very low concentration of a certain...Ch. 22 - 6 If we wish to double the rate of an...Ch. 22 - 7 A bacterial enzyme has the following...Ch. 22 - 8 The optimal temperature for the action of...Ch. 22 - 9 The activity of pepsin was measured at various...Ch. 22 - Prob. 18PCh. 22 - Prob. 19PCh. 22 - Prob. 20PCh. 22 - Prob. 21PCh. 22 - 4 What kind of chemical reaction occurs most...Ch. 22 - 5 Which of the following is a correct statement...Ch. 22 - Prob. 24PCh. 22 - 7 Enzymes are long protein chains, usually...Ch. 22 - Prob. 26PCh. 22 - Prob. 27PCh. 22 - 0 Can the product of a reaction that is part of a...Ch. 22 - 1 What is the difference between a zymogen and a...Ch. 22 - 2 The enzyme trypsin is synthesized by the body in...Ch. 22 - Prob. 31PCh. 22 - Prob. 32PCh. 22 - Prob. 33PCh. 22 - Prob. 34PCh. 22 - Prob. 35PCh. 22 - Prob. 36PCh. 22 - Prob. 37PCh. 22 - Prob. 38PCh. 22 - 1 After a heart attack, the levels of certain...Ch. 22 - Prob. 40PCh. 22 - Prob. 41PCh. 22 - Prob. 42PCh. 22 - 5 Chemists who have been exposed for years to or...Ch. 22 - 6 Which enzyme preparation is given to patients...Ch. 22 - 7 Chymotrypsm is secreted by the pancreas and...Ch. 22 - Prob. 46PCh. 22 - Prob. 47PCh. 22 - Prob. 48PCh. 22 - Prob. 49PCh. 22 - Prob. 50PCh. 22 - Prob. 51PCh. 22 - Prob. 52PCh. 22 - Prob. 53PCh. 22 - Prob. 54PCh. 22 - Prob. 55PCh. 22 - Prob. 56PCh. 22 - Prob. 57PCh. 22 - Prob. 58PCh. 22 - Prob. 59PCh. 22 - Prob. 60PCh. 22 - 1 Food can be preserved by inactivation of enzymes...Ch. 22 - Prob. 62PCh. 22 - 3 Would you expect to find active digestive...Ch. 22 - Prob. 64PCh. 22 - Prob. 65PCh. 22 - Prob. 66PCh. 22 - 7 An enzyme has the following pH dependence: At...Ch. 22 - Prob. 68PCh. 22 - Prob. 69PCh. 22 - 0 Nerve gases operate by forming covalent bonds at...Ch. 22 - 1 What would be the appropriate name for an enzyme...Ch. 22 - Prob. 72PCh. 22 - 3 A liver enzyme is made of four subunits: 2A and...Ch. 22 - Prob. 74PCh. 22 - Prob. 75PCh. 22 - Prob. 76PCh. 22 - Prob. 77PCh. 22 - Prob. 78PCh. 22 - Prob. 79PCh. 22 - Prob. 80PCh. 22 - Prob. 81P
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- Why are enzymes that are used for laboratory or clinical work stored in refrigerators?arrow_forwardAn uncatalyzed reaction has an equilibrium constant, Keq, of 50. In the presence of an appropriate enzyme, the forward rate of the reaction increased by 20-fold. What is the equilibrium constant in the presence of the enzyme?arrow_forwardthe conversion of the amino acid phenylalanine into non-harmful tyrosine is mutated and doesn't work as well (or at all). Phenylalanine will still break down into tyrosine by itself, ol because this is a favorable reaction. Why is the non-functional enzyme a problem? Explain in a few sentences. 3. The disease Phenylketonuria (or PKU) occurs when the enzyme that helps to catalyze O p HOo (pn) O pe oHe avl lls sew.i Snde (a)H noitas on ol woisd sidst nos stolgno ta T b e sd linw ps fertt sro.nalom ni encbeono mundiups sis novi 2noitetnono uTeeg os s oulev THI utinogmet cseo.o 8880 4. Consider the following reaction, which is exothermic: C2H4 (g) + Br2 (g) → C2H¾Br2 (g) ΔΗ< Predict the effect of each of the following perturbations (shift right/products, shift left/reactants, or no effect) using Le Chatelier's principle a. The reaction temperature is increased: b. The reaction volume is decreased: C. More bromine gas is added: d. The reaction is done in the presence of helium: e. C2H4BR2…arrow_forward
- Enzymes function most efficiently at the temperature of a typical cell, which is 37 degrees Celsius. Increases or decreases in temperature can significantly lower the reaction rate. What does this suggest about the importance of temperature-regulating mechanisms in organisms? How does this translate to the development of enzyme assays for clinical laboratory testing equipment? Explain.arrow_forwardWhy do most living organisms have an enzyme to decompose hydrogen peroxide?arrow_forwardWhy do we say the two enzyme-catalyzed reactions taking place in your test tube are "coupled"? O peroxidase and glucose oxidase utilize hydrogen peroxide as a substrate O peroxidase utilizes the lactone produced by glucose oxidase as a substrate O because there is a dye in solution O peroxidase and glucose oxidase utilize glucose as a substrate Operoxidase utilizes the hydrogen peroxide produced by glucose oxidase as a substrate Evaluatearrow_forward
- A. Match the following Enzymes and Substrates: Enzyme III. Substrates a. Sucrase 1. Maltose b. Amylase 2. Amylose C. Lactase 3. Sucrose d. Maltase 4. Arginine e. Arginase 5. Lactosearrow_forwardMeat is refrigerated to prevent spoilage by bacteria because the cold denatures bacterial enzymes inactivates, but does not denature, bacterial enzymes decreases the turnover number of bacterial enzymes makes meat proteins more resistant to bacterial enzyme activityarrow_forwardEnzyme names can often give us valuable information about the reactions that a particular enzyme catalyzes. Shown below is pyruvate, an important molecule in many (energy related) biological processes. Fill in the product molecules for step 1 and 2. Pyruvate decarboxylase Alcohol dehydrogenasearrow_forward
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