For the this and the next two questions, we will be considering the monosaccharides of fructose, galactose, glucose, mannose, and ribose. Drawing all five structures to have in one place could be helpful to answer the following questions. Which of these sugars are five membered rings? Fructose Galactose Glucose Mannose Ribose Question 5 Continuing from the previous problem which of the sugars are derived from aldehydes? Fructose Galactose Glucose Mannose Ribose Question 6 Continuing from the previous problem - which of the sugars are stereoisomers of each other? Fructose Galactose Glucose Mannose Ribose
Carbohydrates
Carbohydrates are the organic compounds that are obtained in foods and living matters in the shape of sugars, cellulose, and starch. The general formula of carbohydrates is Cn(H2O)2. The ratio of H and O present in carbohydrates is identical to water.
Starch
Starch is a polysaccharide carbohydrate that belongs to the category of polysaccharide carbohydrates.
Mutarotation
The rotation of a particular structure of the chiral compound because of the epimerization is called mutarotation. It is the repercussion of the ring chain tautomerism. In terms of glucose, this can be defined as the modification in the equilibrium of the α- and β- glucose anomers upon its dissolution in the solvent water. This process is usually seen in the chemistry of carbohydrates.
L Sugar
A chemical compound that is represented with a molecular formula C6H12O6 is called L-(-) sugar. At the carbon’s 5th position, the hydroxyl group is placed to the compound’s left and therefore the sugar is represented as L(-)-sugar. It is capable of rotating the polarized light’s plane in the direction anticlockwise. L isomers are one of the 2 isomers formed by the configurational stereochemistry of the carbohydrates.
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