8. At room temperature (20 °C), milk turns sour in about 64 hours. In a refrigerator at3 °C, milk can be stored three times as long before it sours. a) Estimate the activationenergy of the reaction that causes the souring of milk. b) How long should it take milkto sour at 40 °C?

A derived form of Arrhenius equation can be used to solved this problem. This equation is given…

Answered: At room temperature (20 °C), milk turns…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Soy sauce is prepared in a CLOSED tank by fermenting a salted mixture of soybeans and wheat with yeast, over a period of 8 to 12 months. The resulting sauce (after solids are removed) is rich in ethanol. (a) How is ethanol produced in the resulting soy sauce? What is the importance of this process? Include the enzymes involved. (b) Could ethanol be produced when the reaction mixture is incubated in an OPEN tank?
14) Which of the following statements is true under the conditions provided: the enzyme concentration is 0.5 nM, substrate concentration is 10 µM, and the KM = 20 µM? a) The enzymatic reaction occurs at maximal velocity. b) The enzymatic reaction occurs between half-maximal and maximal velocity. c) The enzymatic reaction occurs at around half-maximal velocity. d) The enzymatic reaction occurs at between zero and half-maximal velocity. e) Not enough information given to know about the enzymatic reaction rate.
You have been the only one who has been able to this. It has three other parts as well, A) Which Enzyme Catalyzes this reaction? choices are in image provided. B) What is ∆G°' for this reaction? Answer in Joules. K' = 19 C) If the concentration of Glucose-1-phosphate is 48.82 µM at equilibrium, what is the concentration of Glucose-6-phosphate in µM? D) If the reaction is not at equilibrium, what is ∆G' at 25°C if the concentration of Glucose-1-phosphate is 15.04µM and the concentration of Glucose-6-phosphate is 1.62 mM? Answer in Joules. Pay attention to units. Round to the correct number of significant figures. There are 103 µM in 1mM. Thank you and you are the winner for Genius of the day!!
there are A-D questions to this picture set up. A) What enzyme catalyzes this reaction? B) What is Delta G, please answer in Joules, K=19 C) If concentration of Glucose-1_Phosphate is 48.82 uM at equalibrium, what is the concentration of Glucose-6-phosphate in uM? D) If the reaction is NOT at equalibrium, what is delta G at 25C if the concentration of Glucose-1-phosphate is 15.04 uM and concentration of Glucose -6-phosphate is 1.62 mM? please answer in Joules and in significant figures. *note, 10^3uM in 1 mM Thank you!!
6. AG of ATP hydrolysis to ADP and phosphate at 25°C is-30.5 kJ/mol. It means: A) ATP is fast hydrolyzed in aqueous solution, either catalytically or non-catalytically B) at equilibrium concentration of ADP and phosphate are much higher than concentration of ATP C) equilibrium constant for ATP hydrolysis is much less than one reaction of ATP hydrolysis is endergonic D) E) without proper enzyme hydrolysis of ATP does not occur If you have 100 ml. of gastric juice,
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Consider the enzyme pancreatic amylase, which has an optimum pH of 7.0. How is the rate of a pancreatic amylase-catalyzed reaction affected by each of the following changes: (a) lowering the pH from 7 to 4; (b) increasing the pH from 7 to 9; (c) decreasing the temperature from 37 °C to 28 °C; (d) increasing the temperature from 37 °C to 50 °C?
4. The enthalpy change of a chemical process depends only on the initial and final conditions, it is independent of the number of intermediate steps in the process. This sums up the ... a) Hess law b) heat additivity law c) law of the enthalpy of formation d) a and b e) a and c f) b and c 5. The reverse activation energy of a certain exothermic reaction is 50 kJ / mol. The direct activation energy of this reaction is: a) greater than 50 kJ / mol b) less than 50 kJ / mol c) 50 kJ / mol d) 0 kJ / mol 6. What is the overall reaction order for the next reaction. 2A + B – 2C + D v = k [A]• [B]* b) 4 c) 3 d) 2 e) 1 5432N1
1) Answer the following questions about a Vegetarian diet: a) List Pros and Cons of being on the diet. b) List any possible misconceptions that may have been verified or nullified by scientific articles for this diet. c) What biochemical pathway would this diet target?
Based on the kinetic constants below, which enzyme will most efficiently catalyze conversion of the substrate into product? A) Vmax = 10 uM s-1, KM = 10 µM B) Vmax = 10 uM s-1, KM = 0.01 µM C) Vmax = 1000 uM s-1, KM = 500 µM D) Vmax = 1 uM s-1, KM = 1 µM E) Vmax = 200 uM s-1, KM = 10 µM

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At room temperature (20 °C), milk turns sour in about 64 hours. In a refrigerator at 3 °C, milk can be stored three times as long before it sours. a) Estimate the activation energy of the reaction that causes the souring of milk. b) How long should it take milk to sour at 40 °C?