NUTRITION
CARBOHYDRATES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Straight chains of carbon, and 5-sided and 6-sided rings of carbon
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Rings of carbons with up to 9 sides
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Straight chains of carbon and triangles of carbon
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3-sided and 4-sided rings of carbon
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Detailed explanation-1: -Ring forms of sugars As it turns out both are correct: many five-and six-carbon sugars can exist either as a linear chain or in one or more ring-shaped forms. These forms exist in equilibrium with each other, but equilibrium strongly favors the ring forms (particularly in aqueous, or water-based, solution).
Detailed explanation-2: -The term for a five atom sugar ring is “furanose.” Glucose usually makes hemiacetal cyclic structures with six atom rings, although five membered rings can also be formed when the six membered rings are precluded.
Detailed explanation-3: -Pyranose is a collective term for saccharides that have a chemical structure that includes a six-membered ring consisting of five carbon atoms and one oxygen atom. There may be other carbons external to the ring.