Lipids are largely hydrocarbons, long chains of carbon atoms with associated hydrogens. In consequence they tend to be non-polar and hence to be an important component of the boundary layers which separate differing adqueous solutions. They also are a rich store of energy, which can be released by oxidation, the transfer of electrons to oxygen. Biological macromolecules are in general polymers. Name one general class of biological macromolecule and the kind of monomer from which it is constructed, and explain how it can be that there are so many more macromolecules of that class than there monomers from which they are constructed.
Proteins consist of long chains of amino acids, of which there are only about twenty kinds.
However, since each position in the chain can be filled by any of the twenty amino acids, the number of proteins. One page or less, written legibly in the space provided. It also helps to sharpen the question of why particular assemblies, rather than others, are seen. The structure of DNA molecules provides a potential understanding of how living systemes sustain an expanding record of such explorations Among the things which are difficult as yet to understand in terms of atoms and molecules are things like how complex improbable assemblies come into existence, how they remain cohesive in the face of the continuing change inherent in their components, and whether they can in fact give rise to the kinds of properties which are implied by the human experience of living organisms, and of oneself. I guess what I'm trying to figure out is the difference between life and non-life.