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CHEM 210 Module 4 Exam Newest
1. Which carbon in erythrose would tell you if the monosaccharide is D or L? Give the carbon's
number in your answer. ANS On carbon number 3, which is the penultimate carbon.
2. Glucose and mannose are epimers. Name another epimer of glucose be- sides mannose. ANS
galactose
3. Does the compound C7H14O8 fit the formal definition of a carbohydrate? Explain. ANS No. This
compound has does not fit the formula CnH2nOn as indicated in the module. There is one additional oxygen
in this compound.
4. When is the ± 1’c6onnection typically found in carbohydrates? ANS The ± 1’6bond is found in
polysaccharides when branching occurs.
5. What are the similarities and differences between amylose and amy- lopectin? Explain in at least
three complete sentences. ANS Similarities Both of are homopolysaccharides of glucose. They each
have ± 1 ’ 4connections between glucose. They each are part of starch.
Differences Amylopectin has branching with ± 1’6linkages. Amylose does not. Amy- lopectin is typically larger
than amylose.
6. How is chitin different from cellulose? ANS Chitin has glucose with derivatives attached. -NH-CO-
CH3 is connected to each glucose.
