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- Glycolysis is the process by which glucose is metabolized to lactic acid according to the equation C6H12O6(aq)2C3H6O3(aq) G=198 kJ at pH 7.0 and 25°C Glycolysis is the source of energy in human red blood cells. In these cells, the concentration of glucose is 5.0103 M, while that of lactic acid is 2.9103 M. Calculate AG for glycolysis in human blood cells under these conditions. Use the equation G=G+RT In Q, where Q is the concentration quotient, analogous to K.Would you expect the glucose levels of the glucose solution to change appreciably after the addition of the lactase enzyme? Why? O Yes; the lactase enzyme breaks down lactose which would increase the glucose levels O No; the lactase enzyme breaks down lactose, which is not in this solution O Yes; the lactase enzyme will break down the glucose, lowering the concentration O No; the lactase enzyme will simultaneously break down and produce glucose, leaving the glucose level constantOse-OtBu s-OtBu HN 1. LDA 2. N. OMe sO,Ph 3. aqueous workup
- Escriba sobre la flecha los reactivos y condiciones de reacción y luego en los rectángulos la estructura de los intermedios A, B y C que completan la siguiente transformación. HO. HO, A B - 5.will affe 24. Which of the following is an example of positive catalyst. Pt(s) ►2SO3fg) B. H3PO4(s) A. 2SO2(g) + O2lg) 2H2O2() + 2H2O(4 + O2[g) C. NO2(9}+CO{g}→NO{g}+CO2{g) Ivo D. NO(g+O3(g)-NO2{9}+Oztg}Indicate whether the following reactions will occur spontaneously or not. (a) Ni²*caq) + Pb)→ Nio) + Pb²*(a) (b) 3FE²*(mq) + 2Cre)→ 3Fe«)+ 2Cr³*(»q) (c) 2Agʻ(»q) + Crs)→ 2Ags) + Cr²"(aq)
- CH2-N-C-CH2 CH2 CH3 | CH3 Reactant functiona l group (S): Reaction type ! predicted grcoup Is) prodiuct (s) fonctionalConsider the following elementary reaction: (CH;),CBr(aq) - (CH;)¸c"(aq) +Br (aq) Suppose we let k, stand for the rate constant of this reaction, and k_, stand for the rate constant of the reverse reaction. 1 Write an expression that gives the equilibrium concentration of Br in terms of k,, k 1' and the equilibrium concentrations of (CH,) CBr and (CH,)C". [Br] = 0THOTC alcoholsether formation and elimination (alkene formation). In both reactions you are looking for the components of water (OH and H) that will be removed in the reaction. Ether Formation - Two alcohols will form an ether link by loss of water forming an ether product with an acidic catalyst (typically H₂SO4) at 140°C. Н Н Η Η H₂SO4 -H -H + H₂O HellH|4 140 C Н One alcohol loses the hydroxyl group and one loses the H from its hydroxyl group. There are ways of predicting which will lose which, but that is not important now. Ethers can be formed from two molecules of the same alcohol or two different alcohols. When you have two different alcohols you usually get a mixture of the possible ethers. How many possibilities would there be?
- Which is different in the biochemist's thermodynamic conventions compared to the conventions used in chemistry or physics? O The initial concentration of each component is 1.0 M (components other than H). O The standard temperature is 25°C. O The standard [H] is 10 M. pH = 70. O The standard pressure is 1 atm. O The value for AG is a constant.Given the data in the table below, AHrxn for the reaction Ca(OH); + 2H;AsO4 → Ca(H;AsO4)2 + 2H;O is _ kJ. [A] -4219 (B] -130.4 [C] -4519 [D] -76.4 AH, (kJ/mol) -986.6|| Substance Ca(ОН), HASO, Ca(H;AsOa)2 -900.4 -2346.0 H;0 -285.9 O A В C DCalculate the equilibrium constant of the reaction in which glutamine is formed -O2CCH (NH3 +) CH2CH2CONH2 (hereinafter G) from glutamic acid -O2CCH (NH3 +) CH2CH2COOH (G ') in cells, under the action of the synthetase enzyme glutamine. This reaction is used to carry ammonia from the cells to the kidneys, where it is re-released and excreted. Use the value of the standard free reaction enthalpy G '(aq) + NH3 (aq) → G (aq) equal to +15.7 kJ / mol at 37 ° C. The reaction is driven by the feed-back of the ATP (aq) → reaction ADP (aq) + Pi (aq). the standard free enthalpy of which is -31 kJ / mol. What is constant equilibrium joint reaction: G '(aq) + NH3 (aq) + ATP (aq) → G (aq) + ADP (aq) + Pi (aq)?