B, as far as we know humans aren't from space
Those proteins are called apolipoprotien.
A long carbon and hydrogen chain and a carboxyl group.
In images of fatty acids (the monomers of Lipids), it is depicted as a long carbon chain with hydrogen on the ends and connected to them as well, yet on the clear side is the carboxyl group.
Hope this helps!
Answer:
I think the awnser is D. Hope it helps
