18 Questions
What is the term for stereoisomers that differ only in one chiral carbon atom?
Epimers
What is the relationship between epimers and diastereomers?
Epimers are a special case of diastereoisomers
What determines whether a stereoisomer is a D-enantiomer or an L-enantiomer?
The configuration of the highest numbered chiral carbon atom
What is the result of intramolecular cyclisation in the formation of an extra chiral carbon?
Formation of 2 diastereomers of each other
What is the total number of stereoisomers that can be formed with 3 chiral carbon atoms?
8
What is the term for non-superimposable mirror images?
Enantiomers
What is the characteristic of the anomeric carbon atom in a Hayward projection?
Numbered clockwise
Which of the following is an example of a type of diastereomer?
Epimers
What is the direction of the OH group in an α-anomer in the Fischer projection?
Faces down
What is the primary form of hexose rings under physiological conditions?
Pyranose ring
What is the result of oxidation of C1 of aldoses?
Aldonic acids
What is formed by the reduction of carbonyl group on sugars?
Sugar alcohols
What is a factor that determines the distribution between pyranose and furanose ring forms?
All of the above
What is the role of Cu2O in sugar testing?
Forms a red precipitate
What is the result of a hydroxyl group attacking from the top in a reaction?
Pushed down
What is the name of the vitamin derived from D-glucaronate?
Ascorbic acid
What is the equilibrium state of free laconic acids in solution?
With lactones
What is the result of oxidation of the highest numbered C of aldoses?
Alduronic acids
This quiz covers the rules for naming carbohydrates, including the position of the carbonyl group, the number of carbon atoms in the backbone, and the stereochemistry of the chiral carbon atoms.
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