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Polar molecules are those which have a permanent electric dipole moment. What this means is that although the molecule may have an overall neutral charge, one part of it is more negative than the other.
Using water for example, the oxygen is more electronegative and so this end of the molecule is more negatively charged.
ANSWER:
*to assist with understanding, open this link in another browser for diagrammatic reference.
http://kvhs.nbed.nb.ca/gallant/Biology/p…
If you think of the hydrogen bonding in water it become clear why polar molecule are water-loving (or hydrophilic). The polarity this has gives the molecule a partial charge for the molecule allowing it to hydrogen bond with water.
Contrastingly, hydrophobic molecules are non-polar; that is, there is no partial negative or positive charge anywhere on the molecule. Because of this, it repels water.
So in short, those molecule which are polar and have a dipole moment will be hydrophilic and those molecules with no dipole moment (non-polar) are hydrophobic.
Relating this to phospholipids and plasma membranes, the phospholipid can be divided into two sections to examine. The "head" part of the molecule is polar (having a partial charge due to electronegativity) and therefore does not resist interaction with water.
Because of this, the heads of one layer will be in contact with the outside of the cell and the heads of the other layer in contact with the cytoplasm of the cell.
The hydrophobic tails avoid the water and arrange themselves in the middle of the 2 layers.
HYDROPHOBIC = NON-POLAR
What else can I help you with?
Do glycolipids have hydrophilic heads?
Yes, glycolipids have hydrophilic heads. They consist of a hydrophilic carbohydrate portion attached to a hydrophobic lipid tail, making them amphipathic molecules. This structure allows them to interact with water and form the lipid bilayer in cell membranes.
Is bilayer hydrophilic?
A bilayer is composed of two layers of phospholipid molecules, which have hydrophilic (water-attracting) heads and hydrophobic (water-repelling) tails. The hydrophilic heads face outward towards the surrounding water, making the bilayer as a whole hydrophilic on the outer surfaces.
What can assemble into layers due to their charged hydrophilic heads?
phospholipids
Do hydrophilic heads on plasma membranes attract or reple water?
Hydrophilic heads on plasma membranes attract water. These heads are composed of polar molecules that interact with water molecules due to their similar polarity, allowing water to be attracted to and interact with the membrane.
What is both hydrophilic and hydrophobic?
Phospholipids have a hydrophilic ("water-loving") head and a hydrophobic ("water-fearing") tail. This unique structure allows them to form the lipid bilayer of cell membranes, with the hydrophobic tails facing inward and the hydrophilic heads facing outward towards the watery environment inside and outside the cell.
Are the heads of phospholipids hydrophilic?
Yes, the heads of phospholipids are hydrophilic.
Are heads hydrophilic in cell membranes?
Yes, heads of phospholipids in cell membranes are hydrophilic, meaning they are attracted to water.
Do glycolipids have hydrophilic heads?
Yes, glycolipids have hydrophilic heads. They consist of a hydrophilic carbohydrate portion attached to a hydrophobic lipid tail, making them amphipathic molecules. This structure allows them to interact with water and form the lipid bilayer in cell membranes.
Water-loving heads of phospholipids?
hydrophilic
Is bilayer hydrophilic?
A bilayer is composed of two layers of phospholipid molecules, which have hydrophilic (water-attracting) heads and hydrophobic (water-repelling) tails. The hydrophilic heads face outward towards the surrounding water, making the bilayer as a whole hydrophilic on the outer surfaces.
What can assemble into layers due to their charged hydrophilic heads?
phospholipids
Do hydrophilic heads on plasma membranes attract or reple water?
Hydrophilic heads on plasma membranes attract water. These heads are composed of polar molecules that interact with water molecules due to their similar polarity, allowing water to be attracted to and interact with the membrane.
Are the lipids associated with the biological membrane hydrophobic or hydrophilic?
Hydrophyllic heads and hydrophobic tails.
What is both hydrophilic and hydrophobic?
Phospholipids have a hydrophilic ("water-loving") head and a hydrophobic ("water-fearing") tail. This unique structure allows them to form the lipid bilayer of cell membranes, with the hydrophobic tails facing inward and the hydrophilic heads facing outward towards the watery environment inside and outside the cell.
What part of a lipid is hydrophobic?
The tails of lipids are hydrophobic and the heads are hydrophilic hope this helped=) The tails of lipids are hydrophobic and the heads are hydrophilic hope this helped=)
Why is a phospholipid both hydrophilic and hydrophobic?
They have both hydrophilic and hydrophobic heads. In a lipid bilayer, the hydrophilic head of the phospholipid faces the outside of the membrane while the hydrophobic head faces the the hydrophobic head of another phospholipid.
How do the hydrophobic and hydrophilic properties of phospholipids help in maintaining the structure of the cell membrane?
The hydrophobic tails of phospholipids face inward toward each other, creating a barrier that repels water and helps maintain the integrity of the cell membrane. The hydrophilic heads interact with the surrounding water, enabling the membrane to remain stable in an aqueous environment. This dual nature allows phospholipids to form a flexible boundary that controls the passage of substances in and out of the cell.
