Define the following terms with examples (a) enantiomers (b) anomers (c) anomeri

Question

Define the following terms with examples (a) enantiomers (b) anomers (c) anomeric carbon (d) diasteriomers (a) What is a reducing sugar? (b) Are the following disaccharides reducing sugars? (i) isomaltose - (glucose alpha (1 rightarrow 6) glucose) (ii) sucrose - (glucose l alpha rightarrow beta 2 fructose) Explain your answer in a few words Carbohydrates are polymers of monosaccharides. (a) Name the polysaccharide that provides strength and rigidity to bacterial cell walls. (b) Name the monosaccharide unit (s) that polymerize to makes up the polysaccharide in (a). (c) What is the glycosidic linkage of the backbone polymer in (c)? (d) (i) Starch and Glycogen function as ____ polysaccharides. (ii) polysaccharides such as _____ and ___ serve as structural molecules. (iii) Cell surface polysaccharides such as ____ and ____ have a role as ____ molecules. (iv) ____ are polysaccharides that provide strength and rigidity. (a) What is the structure of D- glucose - open

Explanation / Answer

1.

Enantiomers: If the two stereoisomers are mirror images of each other then they are called enanatiomers.

Anomers: The difference in configuration at anomeric carbon atom of cyclic form of sugars.

Anomeric carbon: The carbon which is attached to one OH group and one alkocy group (i.e. hemiacetal)

Diasteroisomers: If the two stereoisomers are not mirror images of each other then they are called diastereomers.

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