somerization of glucose 1-phosphate to glucose 6-phosphate is energetically favorable. At 37°&delta G° = –1.42 log10K deltaG° = –1.74 kcal/mole at 37°C?
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Isomerization of glucose 1-phosphate to glucose 6-phosphate is energetically favorable. At 37°&delta G° = –1.42 log10K deltaG° = –1.74 kcal/mole at 37°C?
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- Chemistry 3.Calculate the amount of free energy required (or released) to allow electron transport in the ETC to be spontaneous from NADH to ubiquinone under standard conditions based on two electrons moving through the system. This occurs at 25°C. ½ O2 + 2e + 2H+ ® H2O E°´ = 0.815 V NAD+ + 2e +H+ ® NADH E°´ = -0.315 V NADP+ + H+ + 2e ® NADPH E°´ = -0.320 V FAD + 2e +2H+ ® FADH2 E°´ = -0.219 V Ubiquinone + 2H + 2e ® Ubiquinol E°´ = 0.045 VDetermine the Kc of the following reaction: AB4(g) + B2C(g) ⇌ AC2(g) + B2(g) Kp = 21/62500One of the important reactions in the biochemical pathway glycolysis is the reaction of glucose-6-phosphate (G6P) to form fructose-6-phosphate (F6P): G6P F6P AG-1.7 kJ Phosphoglucose Isomerase 6 CH2OPO, 2- H. CH2OPO3 ICH,OH H. H. HO. H. 1. H. HO. HO. H. 14 B OH H. H. HO. gluco se-6-phosphate fructo se-6-phosphate Standard thermodynamic conditions imply the concentrations of G6P and F6P to be 1 M, however, in a typical cell, they are not even close to these values. Calc kJ when the concentrations of G6P and F6P are 60.0 ×10M and 14.0 x10 M respectively, assume the temperature is 37 °C. (R = 8.314 J/K-mol) O a. -0.1 kJ Ob.-1.1 kJ Oc.-2.1 kJ O d.-3.1 kJ O e.-4.1 kJ
- If the G for a reaction is 4.5 kcal/mol at 298 K, what is the Keq for this reaction? What is the change in entropy of this reaction if H = 3.2 kcal/mol?Is cocaine (Worked Example 5-2) dextrorotatory or levorotatory?The hydrolysis of pyrophosphate to orthophosphate drives biosynthetic reactions such as DNA synthesis. In Escherichia coli, a pyrophosphatase catalyzes this hydrolytic reaction. The pyrophosphatase has a mass of 120 kDa and consists of six identical subunits. A unit of activity for this enzyme, U, is the amount of enzyme that hydrolyzes 10 umol of pyrophosphate in 15 minutes. The purified enzyme has a Vnax of 2800 U per milligram of enzyme. When (S] >> KM, how many micromoles of substrate can 1 mg of enzyme hydrolyze per second? Vnax = umol -s. mg- If cach enzyme subunit has one active site, how many micromoles of active sites, or (E]r, are there in 1 mg of enzyme? (Er = umol - mg-
- Which of the following bases are strong enough to deprotonate C6H5OH(pKa = 10) so that equilibrium favors the products:(a) H2O; (b) NaOH; (c) NaNH2; (d) CH3NH2; (e) NaHCO3; (f) NaSH; (g)NaH?Which of the following bases are strong enough to deprotonate C6H5OH (pKa = 10) so that equilibrium favors the products: (a) H2O; (b) NaOH; (c) NaNH2; (d) CH3NH2; (e) NaHCO3; (f) NaSH; (g) NaH?H H-C-OH HO-C-H H²-OH H-C-OH 6 CH₂-OH D-(+)-glucose rotate H 6 5 C-CH₂-OH HI OH OH I OH C H 21 OH H H CH₂-OH -OH OH H H OH = H OH CH₂-OH 5 H OH H H ß (a) OH (H) H (OH) OH anomeric carbon D-glucopyranose 1. Redraw wrapping from C1-C6 clockwise. Keep all things on the right of the Fisher projection pointing down, all things on the left pointing up.
- Following are the steps in the industrial synthesis of glycerin. NaOH, H₂O B (C₂H₂O) CH₂=CHCH, Propene Cl₂A (C₂H₂CI) heat C (C₂H,ClO₂) Ca(OH)2, D (C3H6O2) heat Cl₂, H₂O H₂O, HCI OH HOCH₂CHCH₂OH 1,2,3-Propanetriol (glycerol, glycerin)Two sugars differing in configuration at a single asymmetric carbon atom are known as epimers. D-mannose is a C-2 epimer of glucose (Structure I), while D-galactose is a C-4 epimer of glucose. Structure Il and IIl are H- -OH но- -H H OH HO H но- H HO H H -OH H- -OH HO OH H -OH H- -OH H OH HO. HO, OH II II Which of the following represents an aldopentose? OH H O HO O HO H но н HO H но- HO H HO H HO- H OH H OH H OH H OH OH HO Он of но" HO O OH он III IV These are chemical messengers that are secreted by endocrine glands and carried through the bloodstream to target tissues. prostaglandin deoxysugar glycoside hormones Which of the following is NOT correctly paired? cellulose: beta-1,4-glycosidic linkage amylose: alpha-1,4-glycosidic linkage chitosan: alpha-1,4-glycosidic linkage cellubiose: beta-1,4-glycosidic linkageWrite Kc or Kp of the following: CH3 COOH (aq) + C2 H5 OH (aq) ↔ CH3 COOC2 5 (aq) + H2O (l)
