Do You Know?

How polar compounds like NaCl solubilise in  water?

Water basically dissolves polar solutes by hydrating and stabilizing their ions, weakening  the electrostatic interaction between them and thus counteracting their tendency to associate in a crystalline lattice.

Water is effective in screening the electrostatic interactions between dissolved ions because it has high dielectric constant (a physical property that reflects the number of dipoles in a solvent).

Entropy increases as crystalline substances dissolve

Do you know the reason why CO2 and O2 requires RBC to transport them to different organs and cells in the body?

May be because they are non polar gases which can not dissolve in water and therefore needs a carrier to transport them to the different organs or cells.

Nonpolarity and decreased entropy property of the gas will makes them very poorly soluble in water.

How weak interactions like vanderwaal's weak interaction will be crucial for macromolecules structure and function?

The formation of each of the weak interactions contribute to net decrease in the free energy of the system. Stability as measured by the equilibrium constant of the binding reaction varies exponentially with the binding energy. Most stable macromolecules is usually that in which weak interactions are maximized.

Tightly bound water molecules are very important for many proteins Inorder to perform their functions.

Which RNA polymerase does α-amanitin inhibits and how?

RNA polymerase II. α-amanitin actually is used to determine the type of RNA polymerase present. It interacts with the bridge helix in the RNA pol II which interferes the translocation of RNA and DNA needed to empty the site for next round of RNA synthesis.