Organic Chemistry 354 Quiz - December 12, 2000
Dr. Sundin
- 1. Consider this molecule:
- a. Is this molecule a monosaccharide, a disaccharide, a trisaccharide, or a polysaccharide?
Answer
- b. Is this molecule a reducing sugar?
Answer
- c. Is the "hexose" portion of this molecule an aldose or ketose?
Answer
- d. Is the "pentose" portion of this molecule an aldose or ketose?
Answer
- e. Is either the "pentose" or the "hexose" portion of this molecule a
deoxy sugar?
Answer
- 2. Optically active aldopentose A was oxidized with nitric acid
to give optically active B. Degradation of A gave
optically active aldotetrose C. Degradation of C gave
D-glyceraldehyde. Nitric acid oxidation of C gave optically
inactive D. Give Fischer projections of A, B, C,
D, and D-glyceraldehyde.
Answer
- 3. There is another aldopentose which when oxidized with nitric acid also gives
diacid B. Encircle the structure of this aldopentose below.
Answer
- 4. Without drawing any structures, compare and contrast
the structures of cellulose and soluble starch.
Answer
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