Fundamental unit of Lipid is....?
Carbohydrates - monosaccharides particularly glucose and fructose.
Proteins - amino acids
Lipids meaning fats - Glycerol to which three carboxylic acids are attached.
Nucleic acids - nucleotides made of phosphate, the pentose sugar ribose in RNA and deoxyribose in DNA and a purine or pyrimidine base such as adenine or thymine.