Biochem Quiz 6

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Skitty2004
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250855
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Biochem Quiz 6
Updated:
2013-12-04 22:38:11
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biochemistry quiz 6 last
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  1. What is true about naturally occurring monosaccharides?
    • D-isomers predominate
    • D,L do not specify the sign of rotation of plane-polarized light
  2. The intramolecular cyclization reaction of glucose in solution ______.
    generates an asymmetric carbon
  3. What specific bond links the monomers of cellulose?
    B(1-4) glycosidic
  4. Isomers of monosaccharides that differ only in their configuration about the asymmetric carbon are called _____.
    anomers
  5. Hydrolysis of lactose will yield _____.
    glucose and galactose
  6. The cell wall in Gram-negative bacteria consists of two lipid bilayers with ____ between the two bilayers.
    peptidoglycan
  7. The O-glycosidic linkage commonly occurs through ___ residues.
    serine
  8. Amylose has more non-reducing ends than amylopectin.
    False
  9. _____ is the most abundant natural polymer in the world.
    Cellulose
  10. Glycosaminoglycans are linear chains of repeating disaccharides in which one unit is an amino sugar and one or both is negatively charged. [T/F]
    True
  11. D-amino acids are often found in...
    peptidoglycans
  12. Name the following molecule.
    Phosphotidlycholine
  13. ______ cleave fatty acids or polar head groups from a glycerophospholipid, producing lysophospholipids, phosphodiaclyglycerols or diacylglycerols.
    Phospholipases
  14. Dihydroxyacetone is an aldotriose. [T/F]
    F
  15. The intramolecular cyclization reaction of glucose in solution generates an asymmetric carbon yielding a cyclic hemiacetal. [T/F]
    T
  16. The anomeric carbon in glucose is found at the ___ position.
    C-1
  17. An amino sugar has a ____ group at the C-2 position, as in glucosamine.
    NH2
  18. Anylose and amylopectin of starch are each composed of ____ residues.
    Glucose
  19. Glycogen is similar to amylopectin but also contains galactose residues and is more highly branched. [T/F]
    F
  20. The phosphorylase enzyme releases the carbohydrate on the ___ end.
    non-reducing
  21. Which is more heavily branched? Starch of glycogen?
    glycogen
  22. Heparin is a glycosaminoglycans. [T/F]
    True
  23. In what compounds are D-amino acids an important constituent?
    peptidoglycans
  24. N-linked saccharides are attached via the ____ nitrogens of _____ residues.
    • amide
    • asparagine

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