BIOC 3621 CH 16 EXAM QUESTIONS AND
CORRECT ANSWERS
Haworth projection formulas - answer both of the above
Which of the following is not a function of carbohydrates? - answer They are catalytic
components of enzymes.
Which of the following monosaccharides is a ketose? - answer fructose (If no fructose,
then none of them)
Which of the following monosaccharides is an aldose - answer all of them
How many carbon atoms are in the simplest carbohydrates? - answer 3
The simplest ketotriose is - answer dihydroxyacetone.
Mirror image stereoisomers are called - answer enantiomers.
The simplest aldotriose is: - answer glyceraldehyde
In a Fischer projection, which chiral carbon determines whether the sugar is the D- or
the L-isomer? - answer highest numbered asymmetric carbon atom
The carbohydrate shown is - answer all of these
The carbohydrate shown is - answer the D isomer.
Which of the following figures represents the Haworth projection of the carbohydrate
shown? - answer A
For the α anomer of a D-sugar, the anomeric hydroxyl in a Haworth projection - answer
has a downward projection (on the opposite side from the terminal CH2OH group).
Diastereomers are - answer non-mirror-image, nonsuperimposable stereoisomers
D-erythrose is to D-ribose as D-ribose is to: - answer D-altrose
How many enantiomeric pairs are possible for a aldohexose? - answer 8
Sugars which differ in chirality only around one carbon are most specifically called -
answer epimers.
Aldoses can form which type of cyclic structure? - answer Hemiacetal
The cyclic form of sugars - answer has one more chiral center (the anomeric carbon)
than the open-chain form.
, The enantiomer of D-glucose is: - answer L-Glucose
Epimers of D-Glucose include - answer L-Idose and D-Galactose
Diastereoisomers of D-Glucose include all of these, except - answer D-Fructose
Isomers of sugars in which the position of ketone and aldehyde groups have been
changed are called - answer none of these
Which carbon of the open-chain form of a sugar becomes the anomeric carbon in the
cyclic form? - answer the carbonyl carbon
The α and β forms of the same sugar are called - answer anomers.
A pyranose is a sugar that - answer contains a six-membered ring as part of its cyclic
structure.
A furanose is a sugar that - answer contains a five-membered ring as part of its cyclic
structure.
For a D-sugar, any group that is written to the right of the carbon in a Fischer projection
- answer has a downward projection in a Haworth projection.
Which of the following groups is produced when an aldehyde is oxidized? - answer
carboxyl
A lactone is a cyclic - answer ester.
Which of the following compounds is produced by oxidation of an aldose in the cyclic
form? - answer a lactone
Two samples containing identical mixtures of sugars are analyzed, one using Tollen's
reagent, the other with glucose oxidase. Which will give a stronger reaction? - answer
Tollen's reagent
The conversion of a sugar's carbonyl to an alcohol is - answer a reduction reaction.
Deoxyribose is best described as a(n): - answer reduced form of a pentose
When monosaccharides are bonded together - answer all of these
CORRECT ANSWERS
Haworth projection formulas - answer both of the above
Which of the following is not a function of carbohydrates? - answer They are catalytic
components of enzymes.
Which of the following monosaccharides is a ketose? - answer fructose (If no fructose,
then none of them)
Which of the following monosaccharides is an aldose - answer all of them
How many carbon atoms are in the simplest carbohydrates? - answer 3
The simplest ketotriose is - answer dihydroxyacetone.
Mirror image stereoisomers are called - answer enantiomers.
The simplest aldotriose is: - answer glyceraldehyde
In a Fischer projection, which chiral carbon determines whether the sugar is the D- or
the L-isomer? - answer highest numbered asymmetric carbon atom
The carbohydrate shown is - answer all of these
The carbohydrate shown is - answer the D isomer.
Which of the following figures represents the Haworth projection of the carbohydrate
shown? - answer A
For the α anomer of a D-sugar, the anomeric hydroxyl in a Haworth projection - answer
has a downward projection (on the opposite side from the terminal CH2OH group).
Diastereomers are - answer non-mirror-image, nonsuperimposable stereoisomers
D-erythrose is to D-ribose as D-ribose is to: - answer D-altrose
How many enantiomeric pairs are possible for a aldohexose? - answer 8
Sugars which differ in chirality only around one carbon are most specifically called -
answer epimers.
Aldoses can form which type of cyclic structure? - answer Hemiacetal
The cyclic form of sugars - answer has one more chiral center (the anomeric carbon)
than the open-chain form.
, The enantiomer of D-glucose is: - answer L-Glucose
Epimers of D-Glucose include - answer L-Idose and D-Galactose
Diastereoisomers of D-Glucose include all of these, except - answer D-Fructose
Isomers of sugars in which the position of ketone and aldehyde groups have been
changed are called - answer none of these
Which carbon of the open-chain form of a sugar becomes the anomeric carbon in the
cyclic form? - answer the carbonyl carbon
The α and β forms of the same sugar are called - answer anomers.
A pyranose is a sugar that - answer contains a six-membered ring as part of its cyclic
structure.
A furanose is a sugar that - answer contains a five-membered ring as part of its cyclic
structure.
For a D-sugar, any group that is written to the right of the carbon in a Fischer projection
- answer has a downward projection in a Haworth projection.
Which of the following groups is produced when an aldehyde is oxidized? - answer
carboxyl
A lactone is a cyclic - answer ester.
Which of the following compounds is produced by oxidation of an aldose in the cyclic
form? - answer a lactone
Two samples containing identical mixtures of sugars are analyzed, one using Tollen's
reagent, the other with glucose oxidase. Which will give a stronger reaction? - answer
Tollen's reagent
The conversion of a sugar's carbonyl to an alcohol is - answer a reduction reaction.
Deoxyribose is best described as a(n): - answer reduced form of a pentose
When monosaccharides are bonded together - answer all of these
