Lipids are organic macromolecules that serve a variety of purposes. what is the most important role of lipids?

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

What amino acid is coded for by this sequence after the mutation

In many humans, exposing the skin to sunlight over prolonged periods of time results in the production of more pigment by the skin cells (tanning). this change in skin color provides evidence that -