Carbohydrates

ID #1493

I see that all monomers of cellulose are beta glucoses, and all monomers of starch and glycogen are alpha glucoses. Glucoses of cellulose have to be upside down to fit them in because they have beta 1-4 linkage. All of things which I wrote above are right? And do only cellulose fibrils hydrogen bond? Do starch and glycogen have hydrogen bonds between monomers also?


(All of things which I wrote above are right?)

Almost. Glucoses aren't really "upside down." Every other monomer is rotated in 3-dimensional space by 180 degrees to allow the monomers to fit together. When we attempt to represent this on paper, the most effective way to do so is to draw each one of these rotated monomers upside down relative to the standard convention.

(And do only cellulose fibrils hydrogen bond? Do starch and glycogen have hydrogen bonds between monomers also?)

Yes, glycogen and starch are capable of H-bonding, but the amount of that
H-bonding will be much less extensive than that of cellulose. Please check one of the other messages in this section for a more detailed explanation.

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