1. What are the organic
chemical groups that
characterize carbohydrates?
How are carbohydrates
classified according to the
presence of those groups?

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Carbohydrates are also known as
(starches, cellulose and other
substances are carbohydrates too).

Carbohydrates are polyhydroxylated
or polyhydroxylated
(polyalcohol aldehydes or polyalcohol
ketones).

Polyhydroxylated aldehydes are called
aldoses and polyhydroxylated ketones
are called ketoses