Hexose -

: The most abundant sugar in nature and the main fuel for cellular respiration.

Hexoses are primarily classified by their functional groups: : Contain an aldehyde group ( −CHOnegative cap C cap H cap O ) at the end of the carbon chain. hexose

A Climber's Guide to Carbohydrates: Part I - Climbing Nutrition : The most abundant sugar in nature and

. They are the primary energy source for most living organisms and serve as fundamental building blocks for larger carbohydrates like starch and cellulose. typically at the second carbon position.

: Found in dairy products; it must be converted to glucose in the liver to be metabolized. Ketohexoses : Contain a ketone group ( ), typically at the second carbon position.