Study Guide with Student Solutions Manual for Seager/Slabaugh/Hansen's Chemistry for Today: General, Organic, and Biochemistry, 9th Edition
9th Edition
ISBN: 9781305968608
Author: Spencer L. Seager, Michael R. Slabaugh, Maren S. Hansen
Publisher: Cengage Learning
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Chapter 20, Problem 20.32E
When handling or storing solutions of enzymes, the
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4) In the lab you are extracting and enzyme called catalase
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reaction in the lab. The potato usually grows in soil pH of
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enzymes activity? If activity is low how would you correct
this issue? Please explain in detail and in your own words.
When the terminal phosphate is cleaved from the adenosine triphosphate molecule, the products are adenosine diphosphate and inorganic phosphate, ATP + H2O ––> ADP + Pi, where Pi stands for the various forms of phosphate that exist at the pH of the particular solution. If the total concentration of Pi is 2.5 x 10–2M, what are the concentrations of the predominant forms of phosphate that exist at pH 7.4?
The protein ovalbumin has an isoelectric point of 4.60. Suppose you did a pH titration of a solution containing ovalbumin. At what pH will the protein aggregate?
Chapter 20 Solutions
Study Guide with Student Solutions Manual for Seager/Slabaugh/Hansen's Chemistry for Today: General, Organic, and Biochemistry, 9th Edition
Ch. 20 - What is the role of enzymes in the body?Ch. 20 - List two ways that enzyme catalysis of a reaction...Ch. 20 - What is the relationship between an enzyme and the...Ch. 20 - Why are so many different enzymes needed?Ch. 20 - Define what is meant by the term enzyme...Ch. 20 - Prob. 20.6ECh. 20 - Prob. 20.7ECh. 20 - Prob. 20.8ECh. 20 - What is the relationship between urea and urease?...Ch. 20 - Match the following enzymes and substrates: Enzyme...
Ch. 20 - Match the following general enzyme names and...Ch. 20 - Prob. 20.12ECh. 20 - Some enzymes consist of protein plus another...Ch. 20 - Prob. 20.14ECh. 20 - Prob. 20.15ECh. 20 - Prob. 20.16ECh. 20 - Prob. 20.17ECh. 20 - Prob. 20.18ECh. 20 - Prob. 20.19ECh. 20 - How is enzyme specificity explained by the...Ch. 20 - Prob. 20.21ECh. 20 - Prob. 20.22ECh. 20 - Prob. 20.23ECh. 20 - What observations may be used in experiments to...Ch. 20 - Prob. 20.25ECh. 20 - Prob. 20.26ECh. 20 - Prob. 20.27ECh. 20 - Write a single sentence to summarize the...Ch. 20 - Prob. 20.29ECh. 20 - Prob. 20.30ECh. 20 - Prob. 20.31ECh. 20 - When handling or storing solutions of enzymes, the...Ch. 20 - Prob. 20.33ECh. 20 - Prob. 20.34ECh. 20 - Prob. 20.35ECh. 20 - List an antidote for each of the two poisons in...Ch. 20 - Prob. 20.37ECh. 20 - Prob. 20.38ECh. 20 - Describe the importance of zymogens in the body....Ch. 20 - Prob. 20.40ECh. 20 - Prob. 20.41ECh. 20 - Name and contrast the two types of modulators.Ch. 20 - Prob. 20.43ECh. 20 - Prob. 20.44ECh. 20 - Prob. 20.45ECh. 20 - Prob. 20.46ECh. 20 - Prob. 20.47ECh. 20 - Prob. 20.48ECh. 20 - Prob. 20.49ECh. 20 - Prob. 20.50ECh. 20 - Prob. 20.51ECh. 20 - Prob. 20.52ECh. 20 - Prob. 20.53ECh. 20 - Prob. 20.54ECh. 20 - Explain how the pasteurization of milk utilizes...Ch. 20 - Prob. 20.56ECh. 20 - Prob. 20.57ECh. 20 - Prob. 20.58ECh. 20 - Prob. 20.59ECh. 20 - Why are enzymes that are used for laboratory or...Ch. 20 - Describe the difference between graphs showing...Ch. 20 - Answer the question associated with Figure 20.3....Ch. 20 - Prob. 20.63ECh. 20 - Prob. 20.64ECh. 20 - Prob. 20.65ECh. 20 - Prob. 20.66ECh. 20 - Prob. 20.67ECh. 20 - Which of the following is not a characteristic of...Ch. 20 - The human body has an average pH of about 7 and a...Ch. 20 - Look at Table 20.4 and identify the proteolytic...Ch. 20 - Saliva contains mucus, water, and _______, which...Ch. 20 - Most human enzymes function best in the...Ch. 20 - The site on an enzyme molecule that does the...Ch. 20 - The process by which an enzyme acts on the...Ch. 20 - In the multienzyme sequence shown below, molecules...
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- How is enzyme specificity explained by the lock-and-key theory?arrow_forwardDescribe the difference between graphs showing temperature versus reaction rate for an enzyme-catalyzed reaction and an uncatalyzed reaction.arrow_forwardExplain why a protein is least soluble in an aqueous medium that has a pH equal to the isoelectric point of the protein.arrow_forward
- When the terminal phosphate is cleaved from the ADP molecule, the products are adenosine diphosphate and inorganic phosphate: ATP + H2O ––> ADP + Pi where Pi stands for the various forms of phosphate that exist at the pH of the particular solution. If the total concentration of Pi is 2.5 x 10–2 M, what are the concentrations of the predominant forms of phosphate that exist at pH 7.4?arrow_forwardChoose any amino acid and show, by diagrams of your own creation, how pH will modify the charge distribution of the molecule. Which form is present at the isoelectric point?arrow_forwardThe amino acid alanine has two isomers, a-alanine and ẞ-alanine. When equal masses of these two compounds are dissolved in equal amounts of a solvent, the solution of a-alanine freezes at the lowest temperature. Which form has the larger equilibrium constant for ionization (HX=H+X-)? (A) B-alanine B a-alaninearrow_forward
- An enzyme is needed to be stored in a buffer solution with a pH of 10.00. Unfortunately, only three buffer systems are available in their laboratory: Buffer System Weak Acid Component Ka Conjugate Base Salt PAH Benzoic acid, C6H5COOH 6.25 x 10-5 NaC6H5COO SAD Boric acid, H3BO3 5.81 x 10-7 NaH2BO3 DOH Hydrogen cyanide, HCN 6.20 X 10-10 NaCN In what buffer system (PAH, SAD, or DOH) will Phoebe store the enzyme? (show calculations and briefly explain) Write the equilibrium reaction involved in the buffer system. Calculate the amount (in mL) of the 2.00 M stock solution (pH 10.00) of the same buffer system needed to prepare 250 mL of a 0.650 M buffer pH 10.00.arrow_forwardYou have 1 M (1 mol/L) solution of amino acid. This amino acid has an alpha carboxyl group with pKa = 2.0 and an alpha- amino group with pKa = 10.0. The pH of the solution is 7.0. Calculate the concentration of the molecular form of this amino acid that has carboxyl group protonated (COOH) and, at the same time, the amino group deprotonated (NH2).arrow_forwardFor an acid HA with a pKa of 5.2, what is the ratio of the concentration of the conjugate base to that of the acid at pH 7.2.arrow_forward
- Lactase is an enzyme that breaks down the sugar lactose which is commonly found in dairy products. Some people develop lactose intolerance as they grow older and the amount of lactase enzyme in their gut diminishes. Since the enzyme is commonly found in the gut of humans it can withstand a pH that is very acidic, ranging from a pH of 2-7. A student decided to do an experiment to determine how the pH of a solution affects lactase enzyme activity. Lactase works by breaking lactose into its two component sugars of glucose and galactose. To conduct the experiment the student prepared a solution of lactose and placed it into 5 different test tubes. A pH buffer solution was then added to each test tube with a pH of 2.0 in the first tube, 4.0 in the second, 6.0 in the third, 8.0 in the fourth, and a 10 pH in the fifth. Next, the enzyme lactase was added in equal amounts to each test tube and allowed to sit for ten minutes white the enzyme reacted with the lactose. At the end of the ten…arrow_forwardThe equilibrium expression for any weak acid can be written as HA (aq) + H20 (1) = A- (aq) + H;O+ (aq) 1. Write the K value expression based on the equation above (remember that pure liquids are not included in the K expression). This is given the special symbol Ka. 2. In this experiment, you will be using pH to find [H3O+]. The relationship is [H3O*] = 10-PH . For a pH of 7.4, find the [H3O+].arrow_forwardA certain drug binds to a protein with Kd = 850.0 nM. What initial concentration of the drug would you need to add to a 50.0 µM solution of the protein so that 95.0% of the protein molecules are drug-bound at equilibrium? A. 1.62 μM B. 16.2 μΜ C. 47.5 μΜ D. 52.6 μM E. 63.7 μΜarrow_forward
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