A Fischer projection of a monosaccharide is shown below: H H H- CHO -OH -OH -OH CH₂OH a. Classify this monosaccharide (e.g., aldotriose) b. Does it have the D or L configuration? c. Which carbon and oxygen become bonded in the furanose ring form of this monosaccharide (e.g., C206, where 06 means the oxygen on carbon 6, or "not formed")? d. Which carbon and oxygen become bonded in the pyranose ring form of this monosaccharide e.g., C206 or "not formed"?

Chemistry for Today: General, Organic, and Biochemistry
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Chapter17: Carbohydrates
Section: Chapter Questions
Problem 17.53E
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From the choices given below select the aldohexose that yields the same alditol as L-mannose upon reduction with NaBH4.
Select ALL monosaccharides that satisfy the requirement, excluding the structure referenced in the question.
Note that only D structures are shown. To select an L structure click on the name.
If no selection exists, then select the referenced structure.
H
H-
H
H
CHO
-OH HO-
-OH H
-OH H
-OH
H
CH₂OH
D-Allose
L-Allose
CHO
-H
H
OH HO-
-OH
H
-OH
H-
CH₂OH
D-Altrose
L-Altrose
CHO
CH₂OH
D-Glucose
CHO
OH HO
-H
-H HO-
-H
H-
OH
H
-OH HO-
-OH H-+ OH H
L-Glucose
CH₂OH
D-Mannose
H-
L-Mannose
CHO
OH
OH
H
-H HO
OH H-
CH₂OH
D-Gulose
L-Gulose
HO
CHO
-H
H-
-OH HO-
-H HO-
-OH
H
CH₂OH
D-Idose
L-Idose
CHO
OH HO
-H HO-
-H
HO
-OH
CH₂OH
D-Galactose
L-Galactose
H-
CHO
-H
-H
-H
-OH
CH₂OH
D-Talose
L-Talose
Transcribed Image Text:From the choices given below select the aldohexose that yields the same alditol as L-mannose upon reduction with NaBH4. Select ALL monosaccharides that satisfy the requirement, excluding the structure referenced in the question. Note that only D structures are shown. To select an L structure click on the name. If no selection exists, then select the referenced structure. H H- H H CHO -OH HO- -OH H -OH H -OH H CH₂OH D-Allose L-Allose CHO -H H OH HO- -OH H -OH H- CH₂OH D-Altrose L-Altrose CHO CH₂OH D-Glucose CHO OH HO -H -H HO- -H H- OH H -OH HO- -OH H-+ OH H L-Glucose CH₂OH D-Mannose H- L-Mannose CHO OH OH H -H HO OH H- CH₂OH D-Gulose L-Gulose HO CHO -H H- -OH HO- -H HO- -OH H CH₂OH D-Idose L-Idose CHO OH HO -H HO- -H HO -OH CH₂OH D-Galactose L-Galactose H- CHO -H -H -H -OH CH₂OH D-Talose L-Talose
A Fischer projection of a monosaccharide is shown below:
H-
H-
H-
CHO
-OH
OH
-OH
CH₂OH
a. Classify this monosaccharide (e.g., aldotriose)
b. Does it have the D or L configuration?
c. Which carbon and oxygen become bonded in the furanose ring form of this monosaccharide (e.g., C206, where 06 means the oxygen on carbon 6, or "not formed")?
d. Which carbon and oxygen become bonded in the pyranose ring form of this monosaccharide e.g., C206 or "not formed"?
Transcribed Image Text:A Fischer projection of a monosaccharide is shown below: H- H- H- CHO -OH OH -OH CH₂OH a. Classify this monosaccharide (e.g., aldotriose) b. Does it have the D or L configuration? c. Which carbon and oxygen become bonded in the furanose ring form of this monosaccharide (e.g., C206, where 06 means the oxygen on carbon 6, or "not formed")? d. Which carbon and oxygen become bonded in the pyranose ring form of this monosaccharide e.g., C206 or "not formed"?
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