Consider two reductive half-reactions:A+ 2e+ 2H+ BE'° = 0.3 VX+2e+ 2H+ =YE'° = 0.4 VWhich of the following is true under standard biochemical conditions?Y+ A B+X is a spontaneous reaction.X+BY+A is a spontaneous reaction.Neither Y+AB+X nor X+BY+A is spontaneous.Both Y+AB+X and X +BY+A are spontaneous reactions.

For a general reaction of the type aA+bB→cC+dD, the standard free-energy change and the equilibrium…

Answered: Consider two reductive half-reactions:…

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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Refer to the reaction scheme of the GAPDH catalyzed formation of 1,3-BPG. In the reaction, the nucleophile in step (4) is an inorganic phosphate molecule. The enzyme active site is elaborately constructed so that inorganic phosphate, not water, acts as the nucleophile. What advantage is gained by using inorganic phosphate, instead of water, as the nucleophile? Discuss in terms of the energy yield of glycolysis. No need to calculate the total net energy yield of glycolysis.
Since all of the ββ-lactams that you have tested are susceptible to hydrolysis by PaESBL-1, the hospital will not be able to use a single ββ-lactam to combat this P. aeruginosa isolate. You need to consider alternative strategies. From the following list, select all of the strategies that might successfully overcome the broad substrate specificity of PaESBL-1:
Balance each of the following redox reactions occurring in acidic solution. |-(aq)+NO-2(aq)→12(s)+NO(g)l-(aq)+NO2- (aq)→12(s)+NO(g) Express your answer as a chemical equation. Identify all of the phases in your answer. ClO-4(aq)+Cl-(aq)→CIO-3(aq)+CI2(g)CIO4- (aq)+Cl-(aq)→Cİ03-(aq)+Cl2(g) Express your answer as a chemical equation. Identify all of the phases in your answer. NO-3(aq)+Sn2+(aq)→Sn4+(aq)+NO(g)NO3- (aq)+Sn2+(aq)→Sn4+(aq)+NO(g) Express your answer as a chemical equation. Identify all of the phases in your answer.
What are the amino acids of the catalytic triad of chymotrypsin? State the mode of catalysis shown by each of the amino acids that you have named. (a) (b) Predict what will happen if aspartic acid of the triad is replaced by asparagine. (c) Briefly explain the role of the oxyanion hole for the catalysis of chymotrypsin.
Explain the biochemical defect that leads to Lesch-Nyhan syndrome and suggest how the defect might cause the behavioral symptoms characteristic of the disorder.
5) In the below two step transformation, the first step AG is positive i.e. 1.7 kJ/mol. Yet this two step coupled reaction takes place to form Fructose-1.6-bisphosphate. Explain why?" C-H CH-OH CH,-0 H-C-OH AG"- 1.7 KJ/mol (+0.4 kcalmol) C=0 AG"=-14.2 k/mol(-3.4 kcalmol) HO-C-H HO-C-H HO-C-H H-C-OH H-C-OH H-C-OH H-C-OH H-C-OH ATP ADP H-C-OH CH-0-P. CH,-0-P-o- CH,-o- Glucose-6-phosphate Fructose-6-phosphate Fructose-1,6-bisphosphate
A bacterial culture is grown using either octadecane (C18H38) or pentachlorophenol (C6HOCl5)) as the sole source of carbon and energy. The cell yield value is determined by dry weight analysis to be 1.49 for octadecane and 0.05 for pentachlorophenol. Using either octadecane or pentachlorophenol, please describe the steps taken (and the final result) showing what percentage of the substrate carbon will be found as cell mass and as CO2? Please show all calculations and give correct answers.
Consider 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 diminished
Among the following biochemical condition, which condition describes forward (spontaneous) reaction? a) Q >> Keq b) ΔΔG=0 c) Keq=1 d) Q << Keq
Which of the following is an aldo-tetrose ? * НО H НО Н OH Н OH OH CH2OH (a) (d) H Н НО H A B D OE н -ОН -ОН CH₂OH c=0 н -OH CH₂OH (b) (e) н НО НО H- CH₂OH c=0 -H H OH CH₂OH (c) H Н CH₂OH Т c=0 OH OH CH2OH
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Saccharomyces cerevisiae is used in the production of wine and beer, while Lactobacillus acidophilus is used in making yogurt. Explain why each is biochemically suited to the manufacturing of each of these products.

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