Give the information, regarding structure of lipids.

Explanation

Lipids are generally water soluble They could be simple fatty acids.
A fatty acid has a carboxyl group attached to an R group.
The R group could be a methyl `(-CH_3)`, or ethyl `(-C_2H_5)` or higher number of `-CH_2` groups (1 carbon to 19 carbons). For example, palmitic acid has 16 carbons including carboxyl carbon. Arachidonic acid has 20 carbon atoms including the carboxyl carbon.
Fatty acids could be saturated (without double bond) or unsaturated (with one or more C = C double bonds).
Another simple lipid is glycerol which is trihydroxy propane.
Many lipids have both glycerol and fatty acids. Here the fatty acids are esterified with glycerol. They can be then monoglycerides, diglycerides and triglycerides. These are also called fats and oils based on melting point.
Oils have lower melting point (e.g., gingely oil) and hence remain as oil in winters.
Some lipids have phosphorous and a phosphorylated organic compound in them. These are phospholipids. They are found in cell membrane. Lecithin is one example. Some tissues especially the neural tissues have lipids with more complex structures.