Vollhardt,Chapter24

Vollhardt,Chapter24 - Chapter 24: 1. What are...

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Chapter 24: 1. What are carbohydrates? a. Aldoses and ketoses. b. The mono-, di-, tri-, oligo-, and poly-saccharide forms of sugars. c. Pentoses and hexoses. d. Sucrose and other monosaccharides. Answer: B 2. Sugars in a ring configuration are classified as what type of molecule? a. An intramolecular hemiacetal. b. An intermolecular saccharide. c. An intramolecular saccharide. d. An intermolecular hemiacetal. Answer: A 3. Haworth Projections help clarify what aspect of sugars’ molecular structures? a. Optical activity at each stereocenter. b. Ring size and strain. c. Hydroxy numbers in relation to the ring. d. Hydroxy positions in relation to the ring. Answer: D 4. Why can the optical rotation of glucose change over time? a. Because of the relative weakness of the C-O ring bonds in the cyclic form of glucose. b. Because of flexion at what would be the aldehyde carbon in an open chain configuration. c.
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Vollhardt,Chapter24 - Chapter 24: 1. What are...

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