Question

◾An explanation of how the carbon atom is transferred between molecules.

Answer 1

please help

Answer 2

They're not, generally.

A case could exist where a covenant bond forms between carbons of two different molecules, A and B, so that they become one molecule. If a different bond then broke in what had been Molecule B so that it dissociated, leaving part of the initial molecule bound to A, the net result would be the "transfer" of one or more carbon atoms from molecule B to molecule A.

But in general, molecules don't "trade" or "transfer" whole atoms. Particularly in biologic systems, where energy barriers involved in bond making and breaking events are, in general, high.