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Carbohydrate Nomenclature

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Questions and Answers

What is the term for stereoisomers that differ only in one chiral carbon atom?

Enantiomers

Epimers (correct)

Diastereomers

Stereoisomers

What is the relationship between epimers and diastereomers?

Diastereomers are a type of epimers

Epimers are a type of enantiomers

Epimers are a special case of stereoismers

Epimers are a special case of diastereoisomers (correct)

What determines whether a stereoisomer is a D-enantiomer or an L-enantiomer?

The configuration of the highest numbered chiral carbon atom (correct)

The number of C-atoms in the backbone

The position of the carbonyl group

The number of chiral carbon atoms

What is the result of intramolecular cyclisation in the formation of an extra chiral carbon?

Formation of 2 diastereomers of each other Signup and view all the answers

What is the total number of stereoisomers that can be formed with 3 chiral carbon atoms?

8 Signup and view all the answers

What is the term for non-superimposable mirror images?

Enantiomers Signup and view all the answers

What is the characteristic of the anomeric carbon atom in a Hayward projection?

Numbered clockwise Signup and view all the answers

Which of the following is an example of a type of diastereomer?

Epimers Signup and view all the answers

What is the direction of the OH group in an α-anomer in the Fischer projection?

Faces down Signup and view all the answers

What is the primary form of hexose rings under physiological conditions?

Pyranose ring Signup and view all the answers

What is the result of oxidation of C1 of aldoses?

Aldonic acids Signup and view all the answers

What is formed by the reduction of carbonyl group on sugars?

Sugar alcohols Signup and view all the answers

What is a factor that determines the distribution between pyranose and furanose ring forms?

All of the above Signup and view all the answers

What is the role of Cu2O in sugar testing?

Forms a red precipitate Signup and view all the answers

What is the result of a hydroxyl group attacking from the top in a reaction?

Pushed down Signup and view all the answers

What is the name of the vitamin derived from D-glucaronate?

Ascorbic acid Signup and view all the answers

What is the equilibrium state of free laconic acids in solution?

With lactones Signup and view all the answers

What is the result of oxidation of the highest numbered C of aldoses?

Alduronic acids Signup and view all the answers