Molecules with a relatively high lipid solubility are capable of crossing the membrane

a. through specific lipid channels.
b. directly through the lipid bilayer.
c. only with the addition of energy.
d. indirectly by moving across a carrier protein.
d. only through specific protein channels.

Option B) directly through the lipid bilayer.

Explanation:

Since membrane are made up of a phospholipid bilayer, with hydrophobic heads and hydrophilic tails, it permits the movement of nonpolar (organic) molecules to diffuse through it into the biological membrane. This is because they are lipophilic (lipid-loving) substances.

Examples of molecules that passed directly through the lipid bilayer are pollutants such as poly-aromatic hydrocarbons, benzopyrene etc.

option B.

Directly through lipid bilayer.

Explanation:

Molecules with high lipid solubility can pass through lipid bilayer.

Lipid bilayer is a structure of the cell membrane that allow small uncharged molecules, lipid and hydrophobic molecules to pass through the cell membrane across their concentration gradient by a process of diffusion. Examples of molecules with high lipid solubility are oxygen, carbon dioxide, lipids, fat soluble vitamins e.t.c. The molecules are unionized form(lipophilic) and can diffuses readily across the cell.

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