Why are glucose molecules formed at the second stage of photosynthesis, and then polysaccharides are synthesized?

Since glucose is a simple monosaccharide sugar, consisting of one molecule. And polysaccharides (starch, glycogen, cellulose, etc.) are complex sugars, consisting of several monosaccharides – from several glucose molecules. In the body, synthesis goes from simple to complex, that is, first glucose and then polysaccharides.

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