The difference between alpha and beta glucose is quite subtle.
Alpha glucose is what’s termed in chemistry a cis isomer while beta glucose is a trans isomer. Cis because the hydrogen (top, H) and hydroxyl (bottom OH) groups on the left and right of the glucose are on the same side of each other, and for beta glucose it’s trans because they are across from each other diagonally, and not on the same side.
The points about starch being suitable for energy storage due to its chemical and physical properties also apply to glycogen. Cellulose and chitin are suitable for structural support rather than energy storage due to the arrangement of bonds between monomers, described in the cellulose section.
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