At different glucose concentrations (2 mol of glucose, 4 mol of glucose, 8 mol of glucose), at what time, in milliseconds, was the increase in ATP the greatest and how does this affect the potential (mV) graph?
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At different glucose concentrations (2 mol of glucose, 4 mol of glucose, 8 mol of glucose), at what time, in milliseconds, was the increase in ATP the greatest and how does this affect the potential (mV) graph?
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- The maximum saturation, 28.3ug of enzyme in 25ml water catalyzes the oxidation of ethanol at a rate of 2.5mm/min. Calculate the kcat in units of seconds if the enzyme has a molar mass of 65kg/mol.A phosphatase, acting on glycerophosphate, is capable of releasing inorganic phosphate with the results that appear in the attached table. Graphically calculate KM and Vmax in the conditions of the experiment. Concentration of glycerophosphate (mM) Realeased phosphate in 10 min (micromol) (µmol)Calculate what the intracellular glucose concentration should be if to transport glucose in active form from the external medium (c1 = 5 mM) at 37 ºC, a energy input of + 2970 J / mol.
- In considering active transport by Na + -K + -ATPase at body temperature (37 o C), 3 Na+ are pumped out of the cell and 2 K + are pumped in for each ATP that is hydrolyzed to ADP + P i . Given that underyour experimental conditions, the DG for ATP hydrolysis is -10 kcal/mol, and that V is -60 mV, and that the pump maintains the internal Na + at 10mM, external Na + at 120 mM, internal K + at 120 mM and external K + at 8mM, what is the efficiency of the pump (i.e., what fraction of the energy available from ATP hydrolysis is required to drive transport at the provided levels)?A 70-kg adult human (154 lb) could meet his orher entire energy needs for one day by eating 3 moles ofglucose (540 g). (We do not recommend this.) Each mol-ecule of glucose generates 30 molecules of ATP when it isoxidized to CO2. The concentration of ATP is maintained incells at about 2 mM, and a 70-kg adult has about 25 litersof intracellular fluid. Given that the ATP concentrationremains constant in cells, calculate how many times perday, on average, each ATP molecule in the body is hydro-lyzed and resynthesized.Assuming that the pH of the IMS is 1.4 units lower than the pH of the matrix, the free energy yield associated with the transport of a proton from the mitochondrial intermembrane space (IMS) to the mitochondrial matrix is △ G of the reaction is 8.310 KJmol-1 What is the minimum number of protons that must enter the mitochondrial membrane from the IMS in order to synthesize one molecule of ATP?
- 2.For question number 1 if a mixture was prepared containing 1 M Glucose 6-Phosphate and 0.001 M Glucose 1-Phosphate the ∆G for this reaction is: included question 1 however, need help with 2 and provided the option for the answer 1.What is the Keq for the conversion of Glucose 1-Phosphate to Glucose 6-Phosphate if the phosphate transfer potential for Glucose 1-Phosphate and Glucose 6-Phosphate are 20.9 kJ/mol and 13.8 kJ/mol respectively?An enzyme that follows simple Michaelis–Menten kinetics has an initial reaction velocity of 10 µmol⋅min-1 when the substrate concentration is five times greater than the KM. What is the Vmax of this enzyme in µmol⋅min−1?Your current Vmax (4x10-3 A/S) from the Michaelis-Menten plot has the units of A/s and was determined using 0.1 mg of ADH in a total volume of 1.25 mL. Use the Beer-Lambert equation followed by simple conversion to express your estimated Vmax in (mol )/s per 1 mg ADH. The molar absorptivity of NADH at 340 nm is 6220 L/(mol*cm).
- Consider the following equilibrium at 25ºC :Glucose-1-Phosphate Glucose-6-PhophateUsing the equilibrium concentrations of [Glucose-1-Phosphate] = 0.35 M and [Glucose-6-Phosphate] = 1.65 M, calculate BOTH K′eqand Gº′ for this reaction. Is this reaction exergonicor endergonic? R = 8.314 J/K·molReductive power. What ratio of NADPH to NADP+ is required to sustain [GSH] = 10 mM and [GSSG] = 1 mM ? Use the redox potentials given in Table 18.1 .Calculate theequilibrium constant and thefree energy of (Mg)ATP hydrolysis in a closed system in which concentrations of ATP, ADP and Piare, respectively, 3.5, 1.0, and 5 mMand 25 degrees Celsius. Is the reaction spontaneous?R = 8.314 J/(deg Kelvin-mol).