Organic Chemistry 354 Quiz - December 1, 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 diacid B. Degradation of
A gave optically active aldotetrose C. Degradation
of C gave D-glyceraldehyde. Nitric acid oxidation of C
gave optically inactive diacid 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 its structure below.
-
Answer
- 4. Without drawing any structures, compare and
contrast the structures of cellulose and soluble starch.
Answer
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