Which of the following is not a lipid ?
A. Wax / lecithin
B. Sterol / cholesterol
C. Glycerol / maltose
D. Lecithin / Ghee
Answer. C) Glycerol / maltose
Lipid is a macro bio-molecule that is soluble in non-polar solvents. Non-polar solvents contain bonds between atoms with similar electronegativities, such as carbon and hydrogen (hydrocarbons, such as gasoline). They don’t have a dipole moment.
Glycerol has a polar hydroxyl group for every carbon atom and thus it is soluble in water. Therefore it is not a lipid. As we know that maltose is also known as sugar which is soluble in polar solvents.