S5. Draw the structure of the following molecules and briefly
describe its function.

(a) A glycerophospholipid that has a saturated C16 fatty acyl
group at position 1, an unsaturated fatty acyl group with the
symbol 18:2n – 6 at position 2 , and a n ethanolamine head
group

b) A sphingomyelin with an N-acyl 18:0 fatty acid and a
phosphocholine head group.

(c) Cholesterol.