D) A carbon atom bonded to four different groups is a stereogenic center. 11. Which of the following statements is true? A) Enantiomers are mirror images that are not superimposable. B) A molecule that is superimposable on its mirror image is chiral. C) A chiral molecule usually contains a plane of symmetry. D) An achiral molecule does not contain a plane of symmetry. 12. Which of the following statements is true? A) Achiral molecules usually contain a plane of symmetry. B) With one tetrahedral stereogenic center, a molecule may or may not be chiral. C) With two or more stereogenic centers, a molecule is always chiral. D) Chiral molecules usually contain a plane of symmetry. 13. Which of the following is the correct definition for a pair of enantiomers? A) A pair of stereoisomers that have a plane of symmetry. B) A pair of stereoisomers that are not mirror images of each other. C) A pair of stereoisomers that are not superimposable mirror images of each other. D) A pair of stereoisomers that are superimposable mirror images of each other.
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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