I know 1->6 bond exists too, in amylose for example, but that one seems logical, since the 6th carbon is easier to access.
I understand why the bonds originate from the hemi-acetal carbon, but I don't understand why they are 1->4.
Why not 1->3 or 1->2 ? Since there are hydroxyles on every carbons in the ring?
While I was writing this, I just had an illumination, maybe someone can confirm:
Could it be that, the formation of glucose chains in plants and animals always make use of enzymes and that it is these enzymes which, by the shape of their active site, dictates what the bonds will be?