10. Lipids

Draw the structure of docosahexaenoic acid (22:6Δ^{4,7,10,13,16,19}) and indicate what type of omega fatty acid it is.

a) Omega-3 fatty acid. 

b) Omega-6 fatty acid. 

c) Omega-9 fatty acid.

d) Omega-4 fatty acid.

Assuming the standard shorthand naming system is used, which of the following is an omega-3 fatty acid?

a) 20:1Δ¹⁴

b) 18:3Δ^9,12,15

c) 20:1Δ^3,12

d) 18:2Δ^9,12

Which of the structures below is an example of an omega-3 polyunsaturated fatty acid? 

a) A

b) B

c) C

d) D