For a protein with two ligand binding sites the binding polynomial has the general form: q=[p](1+2k1[l]+k1k2[l]2) where [p] is the unbound protein concentration and [l] is the free ligand concentration. the equilibrium constants are defined as: k1=[pl]/[p][l] and k2=[pl2]/[pl][l]
a. assume k1=k2=k=10 and [l]=0.15. calculate the fraction of sites bound fb
b. consider a model where k1=αk and k2=k . if k = 10 and [l] = 0.15 as before, calculate the binding fraction is α=0.1

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?

You can decrease the resistance of a length of wire by

Acorporation gives out its profits as dividends paid to whom?