BioScience Dictionary

 
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Ot.

Found Hydrophilic 9 times.

Displaying results 1 to 10.

1. Detergent
A substance which has a nonpolar, hydrophobic part (avoids water) and a polar, hydrophilic part (attracted to water). It can dissolve fat s and oil s (collectively, lipid s) with the hydrophilic end, and as a result can increase the cleaning abilities of its solvent s (whatever it's dissolved in).

2. Hydropathy plot
A graph which shows how hydrophobic each amino acid in a polypeptide is versus where it is located on the polypeptide. The hydropathy plot is used to find clusters of hydrophobic amino acids, which could indicate that the polypeptide in question is a transmembrane protein . A transmembrane protein has hydrophilic parts which protrude out on either side of the cellular membrane , and a hydrophobic center which lies within the membrane.

3. Hydrophilic
Describes a substance that attracts, dissolves in, or absorbs water.

4. Hydrophilic signaling molecule
A type of molecule which, because it is easily dissolved in water (it is hydrophilic ), can easily move through cell membrane s and thus can be secreted from one cell and move into a target cell where it triggers a particular event. Many hormone s and growth factor s are hydrophilic signaling molecules.

5. Hydrophilic
Water-loving. Term applied to polar molecules that can form a hydrogen bond with water.

6. Hydrophobic interaction
The attractive force between molecules due to the close positioning of non- hydrophilic portions of the two molecules.

7. Phospholipids
Asymmetrical lipid molecules with a hydrophilic head and a hydrophobic tail. Lipids with a phosphate group in place of one of the three fatty acid chains. Phospholipids are the building blocks of cellular membranes. Phospholipids have hydrophilic heads (glycerol and phosphate) and hydrophobic tails (the non-polar fatty acids).

8. Polar
* Describes a feature or phenomenon occuring at the end (pole) of an object (such as a planet) or organism (such as an ameba ). * Describes a hydrophilic molecule or substance that dissolves in water. Compare nonpolar .

9. Sterol
Any steroid -based alcohol having a hydrocarbon ( aliphatic ) side-chain of 8-10 carbons at the 17-beta position and a hydroxyl group (-OH) at the 3-beta position (that's why it's an alcohol). Cholesterol is a sterol. Because of its hydrophilic property at the -OH end and hydrophobicity at the hydrocarbon side chain, it can be incorporated into the lipid bilayer s of the cytoplasm ic membrane. However, sterols only exist in the cytoplasmic membranes of eukaryote s while in prokaryote s, virtually none have sterols in their membranes except mycoplasmas, a group of cell wall-less bacteria.

View web definitions »

Learn more about Hydrophilic »