Question

2. A lecithin molecule is a phosphoglyceride with choline as the alcohol group. Given the structure of chome below, use lauric acid and stearic acid to write a structure of a lecithin. Сн, HO-CH2CH2N -CHE CH Choline 3. Beeswax is a wax created by bees when they make their honeycomb. Its major component is triacontanyl palmitate which is an ester of the alcohol triacontanol, HO-CH2)29CH), and palmitic acid. Using line-angle formulas draw the structure of beeswax. 4. Progesterone, a steroid involved in the female reproductive cycle is pictured below. Identify the hydrophobic and hydrophilic parts of the progesterone molecule. H3C CH3 CH3

Answer 1

(a) structure of lecithin lecithin is a mixture of glycero phospho- tipids. laudic acida sto i-lt is a gatudated fatty acid. Stearic add. CH COOH OH CH3 terithis choline HO-CHCH₂ N + CH₃ lecithin monosaturated fatty acid saturated fatty acid. glyceroll- ,Pze هه وال To choline All Hy

(C). Progesterone hydrophobic. 1 hydrophilic part hydrophilic part hydrophobic :- bobpolan Sambatanace molecule that repels the wated insolecule are hydrophobic hydrophilic- --- molecules fooming ionic on a hydrogen bond with the water insolecule are hydrophilic.