Biochemistry
9th Edition
ISBN: 9781319114671
Author: Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher: W. H. Freeman
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- When the following equation of a redox reaction in acidic solution is properly balanced, what are the coefficients for Cr2O72–, Fe2+ H+, Cr3+, Fe3+, and H2O, respectively? __Cr2O72– + __Fe2+ + __H+ --> __Cr3+ + __Fe3+ + __H2O (A) 1, 3, 14, 2, 3, 7; (B) 1, 6, 14, 2, 6, 7; (C) 2, 10, 14, 2, 10, 7; (D) 2, 12, 28, 4, 12, 14arrow_forwardIn the case of an enzyme that catalyzes a reaction at the diffusion limit, how quickly is the product generated in an aqueous solution containing 10 mM of enzyme and 1 mM of substrate? ?+? ⇌??→? a)74,000 M/s b)740 M/s c)7.4 M/s d)0.074 M/sarrow_forwardAt the left is an energy diagram that shows the energy changes for the example of glucose (C6H1206) being converted to CO2 + H2O. One curve is the reaction with enzymes, while the other is without enzymes. For these reactions, the "X" indicates: Glucose + 60g a) b) free energy of glucose free energy of activation without enzymes free energy of CO2 + H2O free energy released free energy of activation with d) e) Progrem af reaction enzymes Frec energy, Garrow_forward
- Suppose you were running out of substrate (PNPP) and decided to reduce the concentration used in your reactions (25 µM, 50 µM, 100 µM, 200 µM, 300 µM) by a factor of 100. How might this affect your kinetic analysis?arrow_forwardConsider the fructose-1,6-bisphosphatase reaction. Calculate the free energy change if the ratio of the concentrations of the products to the concentrations of the reactants is 23.7, and the temperature is 37.0 °C? AG" for the reaction is -16.7 kJ/mol. The constant R = 8.3145 J/(mol-K) AG= Number kJ/molarrow_forwardConsider the reaction catalyzed by PFK. In the presence of AMP, which of the following will be expected? Check all that apply: a)The Km for substrate would be decreased b) the initial velocity plot would show the curve shifted to the right c) the R state is stabilized d)the rate of the reaction is diminishedarrow_forward
- 1) Define metabolism and describe the importance of metabolism to life. 2) Calculate the change in free energy (∆G ) for the below reaction and answer the two follow up questions: Gfinal state = 3.4 kcal/ mol and Ginitial state = 10.7 kcal/ mol Recall: ∆G = Gfinal state – Ginitial state a. Is this a spontaneous or non-spontaneous reaction? Explain. b. Is there energy released from this reaction which can be used to do work? Explain. 2) List four conditions which impact an enzymes rate of activity. Explain.arrow_forwardGlucose CO,+X (a) State the name of the process represented by this equation, (b) Name compound X. (c) Explain why energy produced in the above process is stored in form of ATP. uocle cellsarrow_forwardExplain how the observation that reaction (B) runs faster than reaction (A) is related to the enzyme catalysis.arrow_forward
- The following questions are based on the reaction A+ B ↔ C+D shown in Figure 8.1. 1. Which of the following terms best describes the progress of the reaction with respect to free energy change? a) endergonic, ∆G> 0 b) exergonic, ∆G> 0 c) exergonic, ∆G< 0 d) endergonic, ∆G< 0 2. Which of the following in Figure 8.1 remains unchanged by having an enzyme included? a) b b) d c) a d) c 3. The part labeled “C” on the above graph represents a) Energy of activation without enzyme b) Energy of activation with enzyme c) Amount of free energy released d) amount of energy required for the reaction progressarrow_forwardExplain how running a reaction with the enzyme aldolase at a pH of 14 affects its activity Enzyme Activity e Activity 765432TO Factors Affecting Enzyme Activity 0 6543 2 6 Solution pH 8 a) It significantly diminishes activity because enzyme is denatured b) It significantly diminishes activity because the enzyme becomes too reactive Oc) It will quadruple its activity because enzyme is denatured and free Question 9 (5 points) Estimate the optimum pH required for maximum enzyme activity 10 d) It will double its activity because enzyme now has more active sites 12 Factors Affecting Enzyme Activityarrow_forward
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