Question

Question 1-5 points The addition and subtraction of charge to biological molecules such as proteins is critical to the conformational changes that drive essential biological processes. A prime example of this is found in the Sodium-Potassium Pump that maintains imbalances in the concentration of sodium and potassium ions across the cell membrane. A simple model of this pump is shown in the figure below. 2 Potassium ion Sodium ion Phosphate ion In the second panel of the figure we see a configuration of ions that generates an attractive electric force between the captured sodium ions (purple) and the phosphorylation site (ble This causes the pump to change confirmation moving sodium ions to the outside of the cell and letting it collect the potassium ions that need to be transported into the ce Assuming that the group of three sodium ions can be treated as a single +3e point charge, the phosphate ion as single -2e point charge, and that their separation is 7 nm, calculate the magnitude of the attractive electric force generated in this configuration.

Answer 1

-8.qq x 1Dqメ 49 ) +3e -2e So, The barce nuld heste houe So The boLo K(3e) (2e) and the horu would b.e atbaaiwe. (7nm) no 4q nm2