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cabinet Membranes Problem set
problem 3: Hydrophobic forces
Tutorial to aid answer the question
Placing phospholipids right into an aqueous solution immediately results in their creating a lipid bilayer. What is the driving pressure causing this bespeak arrangement?A.
|The phospholipids are very ordered in water, and also gain liberty of movement by creating a bilayer. |
You are watching: What intermolecular forces stabilize a lipid bilayer
|B.||Water, when associated with lipids, is forced into one ordered arrangement with fewer hydrogen bonds. Forcing lipids into a bilayer gains flexibility of activity for the water.|
|C.||Phospholipids have actually a strong affinity for various other phospholipids, leading to self assembly.|
Phospholipids are amphipathic molecules v two hydrophobic fatty acids and also a hydrophilic phosphate-containing group connected to glycerol. When placed in one aqueous solution, water creates a shell approximately the hydrophobic lipid, a situation that not only prevents water native making hydrogen binding with other water molecules, but also reduces flexibility of movement, do the water molecules an ext ordered.
Scientists specify "entropy" together a measure up of disorder. Forcing water to it is in ordered to reduce entropy, a really unfavorable situation. Water benefit entropy when the fat acids are covert in the bilayer. The capability of water to force hydrophobic molecules far is ideal illustrated by a mixture the oil and water in salad dressings. The hydrophobic effect forces the lipids away from the water, making a separate layer. Vigorous shaking can mix the two phases once we want a mixture the oil and also water because that our salad.
Once the bilayer forms, more stabilization originates from other weak forces. Van der Waals forces can an outcome from the pack of fatty acid tails within the bilayer. Hydrogen bonding and also electrostatic attractions (ionic bonds) occur in between the hydrophilic teams of phospholipids and also the aqueous solution.
We say the hydrophobic forces cause the double layer to form, and the various other weak pressures stabilize the bilayer.
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