Question

which of the following shows an unsaturated fatty acid? a. chemical structure with h, s, c, n, o b. chemical structure with h, n, c, ch2, nh2, o c. chemical structure with long - chain of c and h and a c = c bond and o

Explanation:

An unsaturated fatty - acid has one or more carbon - carbon double bonds. Option C shows a molecule with carbon - carbon double bonds, which is characteristic of unsaturated fatty acids. Options A and B do not represent fatty acids; option A appears to be an amino - acid derivative with a sulfur group, and option B is also an amino - acid structure.

Answer:

C.