Calculate the membrane potential in the transport of Cl- from the intracellular environment to the extracellular environment. The Cl- concentration outside the cell is 98 uM, the Cl- concentration in the cytoplasm is 0.025 mM, the Gibbs free energy is -956 J/mol and the temp is 37°C. Have concentration in uM units when solving.

A galvanic cell at a temperature of 25.0 °C is powered by the following redox reaction: 2+ 2+ Sn(aq) +Ba(s) → Sn (s) + Ba** (aq) 2+ 2+ Suppose the cell is prepared with 7.71 M Sn in one half-cell and 5.89 MBa in the other. Calculate the cell voltage under these conditions. Round your answer to 3 significant digits.

Draw Haworth projections formulas for dimers of glucose with the following glycosidic linkages:  1. An alpha (1-4) linkage 2. A beta (1-6) linkage

Consider a polymeric membrane within a 6 cm diameter stirred ultrafiltration cell. The mem- brane is 30 μm thick. The membrane has pores equivalent in size to a spherical molecule with a molecular weight of 100,000, a porosity of 80%, and a tortuosity of 2.5. On the feed side of the membrane, we have a solution containing a protein at a concentration of 8 g L−1 with these properties: a = 3 nm and DAB = 6.0 × 10−7 cm2 s−1. The solution viscosity is 1 cP. The hydrody- namic pressure on the protein side of the membrane is 20 pounds per square inch (psi) higher than on the filtrate side of the membrane. Determine the convective flow rate of the solution across the membrane and the rate at which the protein crosses the membrane. The solution on the feed side of the membrane is being stirred at 900 RPM.

Glucose is the major energy-yielding nutrient for most cells. Assuming a cellular concentration of 1 M (that is, 1 millimole/L), calculate how many molecules of glucose would be present in our hypothetical (and spherical) eukaryotic cell. (Avogadro’s number, the number of molecules in 1 mol of a nonionized substance, is 6.02 × 10 23 .)

The model I was given is picene and I need to answer this question:

Acetic acid (a weak acid with a pKa of 4.75) and ethanol (an alcohol) are each composed of two carbons, hydrogen, and oxygen, and both enter cells by passive diffusion. At pH 7, one is much more able to permeate a cellular membrane than the other. Which is more membrane permeable, and why? Predict how the membrane permeability of each is altered when the extracellular pH is reduced to 1.0, a value typical of the stomach.

I need help calculating Henderson-hasselbach

Components of Complex Biomolecules Figure 1-10 (Lehninger's Biochemistry book) shows the major components of complex biomolecules. For each of the two important biomolecules below (shown in their ionized forms at physiological pH), identify the constituents. And show H-bonding with water. (a) Guanosine triphosphate (GTP), an energy-rich nucleotide that serves as a precursor to RNA: N- NH -CH2 0- NH2 H H H H. ОН ОН (b) Phosphatidylcholine, a component of many membranes: CH3 O- CH3*N-CH2-CH2-0-P-0–CH2 нн CH3 НС —О—С—(CH), —С—С— (CH), — СHз CH,–0-C-(CH,)14–CH3

If a data from an enzyme experiment is plotted as a Lineweaver - Burk plot, and the Vmax is 0.02 sec/mol, and x-intercept is -2.5 mM-1, then what is the KM value?