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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Textbook Question
Chapter 22, Problem 67P
7 An enzyme has the following pH dependence:
At what pH do you think this enzyme works best?
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4.
How are enzymes able to act as such remarkable catalysts of chemical reactions?
Use a reaction coordinate diagram in your answer!
1. An enzyme changes the energy of the reactants of a chemical reaction. True or False
2. An enzyme does not change the energy of the products of a chemical reaction. True or False
3. Does an enzyme change the equilibrium amounts of reactants and products in a biochemical reaction? Justify your answer.
4. How does an enzyme affect the rate of a biochemical reaction?
What is the difference between a catalyst and an enzyme?
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 important? For example, what is the importance of the enzyme carbonic anhydrase in the body?arrow_forwardList two ways that enzyme catalysis of a reaction is superior to normal conditions.arrow_forwardDescribe the difference between graphs showing temperature versus reaction rate for an enzyme-catalyzed reaction and an uncatalyzed reaction.arrow_forward
- Compare the lock-and-key and induced-fit models for substrate binding to an enzyme.arrow_forwardWhy are enzymes that are used for laboratory or clinical work stored in refrigerators?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
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- the 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_forward1. A daily low dosage of aspirin (acetylsalicylic acid) can lower the risk of heart attack and stroke for individuals at risk. Aspirin suppresses the generation of prostaglandins by irreversible binding to the enzyme COX-1. Inhibition of prostaglandin synthesis lowers the production of thromboxanes that are responsible for the aggregation of platelets and the formation of blood clots. You will explore the mechanism of aspirin binding. 1.1 The average pH of the human body is 7.4 (also known as a physiological pH). Draw the structure of aspirin at a physiological pH. OH 1.2 Aspirin reacts with the amino acid Serine. What is the structure of serine? Draw the structure of the tripeptide Ala-Ser-Trp (draw these structures as they exist at physiological pH) serine Ala-Ser-Trp 1.3 Aspirin reacts with Serine 530 of COX-1 by transesterification reaction. Draw a general mechanism of acid-catalyzed transesterification reaction. Use HA as an acid. 1.4 Draw an arrow-pushing mechanism for the…arrow_forwardExplain correct and incorrect option.arrow_forward
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