What is cholesterol?

Phospholipids are:

The structural lipid of the cell is .......

Which groups are present in the structures of sterol and sterone,respectively?

The fish food possesses the lowest level of

Group of substances with greasy consistency and a long chain of hydrocarbons containing $C$,$H$,and $O$,where the hydrogen to oxygen ratio is greater than $2:1$,are called: