CHEMISTRY: AN INTRODUCTION TO GENERAL, O
13th Edition
ISBN: 9780137444298
Author: Timberlake
Publisher: PEARSON
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Textbook Question
Chapter 16.5, Problem 16.45PP
The following graph shows the activity versus pH curves for pepsin, sucrose, and trypsin. Estimate the optimum pH for each.
16.46 Refer to the graph in problem 16.45 to determine if the reaction rate in each condition will be at the optimum rate or not.
- Trypsin, pH 5.0
- Sucrase, pH 5.0
- Pepsin, pH 4.0
- Trypsin, pH 8.0
- Pepsin, pH 2.0
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A process that occurs in the human body is shown in the diagram (arrow's direction points to
the direction of this hydrolysis reaction). What would happen if a temperature change
-caused the shape of the enzyme's active site to be altered?
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The dipeptide would hydrolyze slower or not at all
O The amino acids would combine slower or not at all
The dipeptide would hydrolyze (break down) faster
There will be no effect on the rate of this hydrolysis reaction
The amino acids would combine faster
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Enzyme
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The following graph shows the activity versus pH curves
for pepsin, sucrase, and trypsin. Estimate the optimum pH
for each.
Maximum
activity
No activity
Pepsin
Sucrase Trypsin
01234 567
pH
8 9 10 11 12
16.46 Refer to the graph in problem 16.45 to determine if the
reaction rate in each condition will be at the optimum rate
or not.
a. trypsin, pH 5.0
d. trypsin, pH 8.0
b. sucrase, pH 5.0 c. pepsin, pH 4.0
e. pepsin, pH 2.0
Enzymes that are rather aggressive, and turned "off" by a protein
segment until they are activated.
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Chapter 16 Solutions
CHEMISTRY: AN INTRODUCTION TO GENERAL, O
Ch. 16.1 - Classify each of the following proteins according...Ch. 16.1 - Prob. 16.2PPCh. 16.1 - Prob. 16.3PPCh. 16.1 - Prob. 16.4PPCh. 16.1 - Draw the structure for each of the following amino...Ch. 16.1 - Draw the structure for each of the following amino...Ch. 16.1 - Draw the strcture for each of the following amino...Ch. 16.1 - Prob. 16.8PPCh. 16.1 - Prob. 16.9PPCh. 16.1 - Prob. 16.10PP
Ch. 16.2 - Prob. 16.11PPCh. 16.2 - Prob. 16.12PPCh. 16.2 - Prob. 16.13PPCh. 16.2 - Prob. 16.14PPCh. 16.2 - Prob. 16.15PPCh. 16.2 - Prob. 16.16PPCh. 16.3 - Prob. 16.17PPCh. 16.3 - Prob. 16.18PPCh. 16.3 - Prob. 16.19PPCh. 16.3 - Prob. 16.20PPCh. 16.3 - What type of interaction would you expect between...Ch. 16.3 - What type of interaction would you expect between...Ch. 16.3 - Prob. 16.23PPCh. 16.3 - Prob. 16.24PPCh. 16.3 - Prob. 16.25PPCh. 16.3 - Prob. 16.26PPCh. 16.3 - Prob. 16.27PPCh. 16.3 - Indicate the changes in secondary and tertiary...Ch. 16.4 - Why do chemical reactions in the body require...Ch. 16.4 - Prob. 16.30PPCh. 16.4 - Prob. 16.31PPCh. 16.4 - Prob. 16.32PPCh. 16.4 - Prob. 16.33PPCh. 16.4 - Prob. 16.34PPCh. 16.4 - Prob. 16.35PPCh. 16.4 - 16.36 Match the terms (1) active site, (2)...Ch. 16.4 - Prob. 16.37PPCh. 16.4 - Prob. 16.38PPCh. 16.4 - Prob. 16.39PPCh. 16.4 - Prob. 16.40PPCh. 16.4 - For problems 16.39 to 16.42, see Chemistry Link to...Ch. 16.4 - Prob. 16.42PPCh. 16.5 - Trypsin, a peptidase that hydrolyzes polypeptides,...Ch. 16.5 - pepsin, a peptidase that hydrolyzes proteins,...Ch. 16.5 - The following graph shows the activity versus pH...Ch. 16.5 - The following graph shows the activity versus pH...Ch. 16.5 - Prob. 16.47PPCh. 16.5 - Prob. 16.48PPCh. 16.5 - Prob. 16.49PPCh. 16.5 - Prob. 16.50PPCh. 16.5 - What is the chemical formula for hydroxyurea?Ch. 16.5 - What is the molar mass of hydroxyurea?Ch. 16.5 - Prob. 16.53PPCh. 16.5 - Prob. 16.54PPCh. 16 - Prob. 16.55UTCCh. 16 - Prob. 16.56UTCCh. 16 - Prob. 16.57UTCCh. 16 - Prob. 16.58UTCCh. 16 - 16.59 Identify the amino acids and type of...Ch. 16 - What type of interaction would you expect between...Ch. 16 - Draw the condensed structural formula for...Ch. 16 - Draw the condensed structural formula for...Ch. 16 - Seed and vegetables are often deficient in one or...Ch. 16 - 16.64 Seeds and vegetables are often deficient in...Ch. 16 - Prob. 16.65APPCh. 16 - Prob. 16.66APPCh. 16 - Prob. 16.67APPCh. 16 - Prob. 16.68APPCh. 16 - Prob. 16.69APPCh. 16 - Why do enzymes function only under mild...Ch. 16 - Prob. 16.71APPCh. 16 - Prob. 16.72APPCh. 16 - Prob. 16.73APPCh. 16 - Prob. 16.74APPCh. 16 - Prob. 16.75APPCh. 16 - Prob. 16.76APPCh. 16 - Prob. 16.77APPCh. 16 - Prob. 16.78APPCh. 16 - If a blood test indicates a high level of LDH and...Ch. 16 - Prob. 16.80APPCh. 16 - Prob. 16.81CPCh. 16 - Prob. 16.82CP
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- The 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_forwardWhen handling or storing solutions of enzymes, the pH is usually kept near 7.0. Explain why.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
- Chymotrypsin is secreted by the pancreas and passed into the intestine. The optimal pH for this enzyme is 7.8. If a patient’s pancreas cannot manufacture chymotrypsin, would it be possible to supply it orally? Justifyarrow_forwardSubstrate Enzyme-substrate complex 1. Is this an example of a lock & key or induced fit model of an enzyme? > Enzymearrow_forwardFind an example of an enzyme. a) What is the chemical reaction that is catalyzed by the enzyme? b) Why is this enzyme/chemical reaction important to the organisms in which it occurs?arrow_forward
- Note the Myoglobin O₂ binding curve below. YO2 1.00 0.80 0.60 0.40 0.20 0.0 Myoglobin O₂ Binding Curve 0 2 5 1.6 moles of O₂ 1.0 moles of O₂ 0.4 moles of O₂ 0.2 moles of O₂ 10 15 20 25 30 po₂ (torr) How much O₂ is released by 4 moles of myoglobin moving from pO₂ = 10 torr to pO₂ = 2 torr?arrow_forwardWhich of the following enzyme functional groups is in a form in which it could serve as a general acid catalyst to enhance a reaction rate? B. A. H₂C OH B C O OE -NH2 C. H₂C H-NN-H D. H₂C ·0™ E. α-NH₂arrow_forward13. A specific enzyme will usually only catalyze one particular reacton. True Falsearrow_forward
- The above diagram illustrates ___? The relationship between the proteome and the metabolome The relationship between the concentration of enzymes and the rate of chemical reactions they catalyze a and barrow_forwardExplain the distinction between a general acid catalyst and a specific acid catalyst. Explain how an acid or base provided by an amino acid side chain can catalyze a reaction.arrow_forward3. Some medications permanently inactivate their target enzyme by forming a covalent bond to an amino acid in the enzyme's active site. Aspirin is one example of a pharmaceutical that uses this type of mechanism. So is penicillin. As you saw in the last chapter, the active portion of penicillin is the B-lactam ring. Penicillin forms a covalent bond to serine in the active site transpeptidase, an enzyme that is essential for forming the bacterial cell wall. Propose a mechanism for the inactivation of transpeptidase by penicillin and show the final product of the reaction. NH OH CH3 CH2 CH3 backbone penicillin serinearrow_forward
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