Is there a difference between polarity and hydrophobicity? Hydrophobicity means aversion to water which results because of increase in entropy of the system due to the water-"solute" interaction As already pointed out in by inf3rno, polarity of a molecule is because of its net dipole moment It is true that polar molecules can dissolve in water (because they can interact with water via van der Waals' forces especially Keesom and Debye forces) CO 2
biochemistry - Why dont the heads of phospholipid bilayers repel . . . Your question is rooted in a misundertsanding of the hydrophobic effect Hydrophillic and hydrophobic molecules do not repel but, rather, attract one another through van der Waals interactions The tendency of hydrophobic molecules to aggregate in aqueous solution (ie the hydrophobic effect) is, instead of some repulsive force, actually driven entropically I don’t think I will go into this
What causes leaves to be hydrophobic? - Biology Stack Exchange This is due to presence of a hydrophobic chemical called as cutin present at the the aerial surfaces of plants Cutin is one of two waxy polymers that are the main components of the plant cuticle, which covers all aerial surfaces of plants The other major cuticle polymer is cutan, which is much more readily preserved in the fossil record, [1] Cutin consists of omega hydroxy acids and their
Why dont phospholipid bilayers dissolve? - Biology Stack Exchange We should first understand what happens when a substance dissolves During dissolution water interacts with the solute molecule; if the strength of interaction between the molecule and water is higher than the strength of interaction among the solute molecules then the solute dissolves (Also have a look at this post) Phospholipid is an amphipathic molecule — it has both hydrophobic and
zoology - Algae identification - Biology Stack Exchange I collected some fibre-like algae from a local swamp to isolate and observe under the microscope, but I can't understand whether this is Spirogyra since it's missing the spiral structures inside the
Why do cartilaginous fishes not excrete ammonia? My teacher taught me that bony fishes are ammonotelic while the cartilaginous fishes are ureotelic, but why does that happen? Why do cartilaginous fishes not excrete ammonia?