This is an extract of considerations in the Philosophy of Science:
In this section on page#2 the "theory of everything" is considered and though the biology of the human body contains molecules the connection of molecules to the physical particles as in physics comes to a dead end; though they can look alike the correspondence is tenuous . Again, reading the cited speaks not only to this particular theory but the difficulties in the presentation of knowledge in scientific systems.
And so, the future of consilience , at least according to this paper , shows that researchers have approached many avenues of scientific knowledge and there is probably more. As previously referenced:
http://www.britannica.com/topic/philosophy-of-science
"This argument builds on some important scientific discoveries. Whereas earlier generations thought that living things must contain something more than complex molecules (some “vital substance,” say), or that there must be something more to thinking beings than intricate brains (an “immaterial mind,” for example), contemporary biology and contemporary neuroscience showed that there is no need for such hypotheses. Given the firm consensus of contemporary science, there is a constitutive hierarchy: all molecules are made out of fundamental particles; all organic systems are made out of molecules; people are organic systems; and societies are composed of people. Yet there is a difference between a constitutive hierarchy of the things studied by various sciences and a reductive hierarchy of those sciences. Biology studies organisms, entities composed of molecules (and nothing more); it does not follow that biology can be reduced to the science that studies molecules (chemistry).
To understand this distinction it is necessary to have a clear concept of reduction. The most influential such proposal, by Ernest Nagel, was made within the framework of the axiomatic conception of scientific theories. Nagel suggested that one theory is reduced to another when the axioms of the reduced theory can be derived from the axioms of the reducing theory, supplemented with principles (“bridge principles”) that connect the language of the reduced theory with that of the reducing theory. So, for example, to reduce genetics to biochemistry, one would show how the principles of genetics follow from premises that include the principles of biochemistry together with specifications in biochemical language of the distinctive vocabulary of genetics (terms such as gene, allele, and so forth).
Many philosophers criticized the idea of unified science by arguing that, when reduction is understood in Nagel’s sense, the constitutive hierarchy does not correspond to a reductive hierarchy. They focused specifically on the possibility of reducing biology to physics and chemistry and of reducing psychology to neuroscience. Attempts at reduction face two major obstacles. First, despite serious efforts to formulate them, there are as yet no bridge principles that link the vocabulary of biology to that of chemistry or the vocabulary of psychology to that of neuroscience. It is evidently hard to think of chemical specifications of the property of being a predator, or neurological specifications of the generic state of desiring to eat ice cream, but the problem arises even in more tractable cases, such as that of providing chemical conditions for being a gene. Every gene is a segment of nucleic acid (DNA in most organisms, RNA in retroviruses); the challenge is to find a chemical condition that distinguishes just those segments of nucleic acid that count as genes. Interestingly, this is a serious research question, for, if it were answered, molecular biologists engaged in genomic sequencing would be able to discover the genes in their sequence data far more rapidly than they are now able to do. The fact that ......"