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Carbohydrate Structure and Function

Sean Corcoran 15 preguntas

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Preguntas del test (15)

  1. 1When glucose is in a straight-chain formation, it:
    1. Ais an aldoketose.
    2. Bis a pentose.
    3. Chas five chiral carbons.
    4. Dis one of a group of 16 stereoisomers.
  2. 2All of the following are true of epimers EXCEPT:
    1. Athey differ in configuration about only one carbon.
    2. Bthey usually have slightly different chemical and physical properties.
    3. Cthey are diastereomers (with the exception of glyceraldehyde).
    4. Dthey have equal but opposite optical activities.
  3. 3Aldonic acids are compounds that:
    1. Acan be oxidized, and therefore act as reducing agents.
    2. Bcan be reduced, and therefore act as reducing agents.
    3. Chave been oxidized, and have acted as reducing agents.
    4. Dhave been oxidized, and have acted as oxidizing agents.
  4. 4The formation of ⍺-D-glucophranose from β-D-glucopyranose is called:
    1. Aglycosidation.
    2. Bmutarotation.
    3. Cenantiomerization.
    4. Dracemization.
  5. 5Ketose sugars may have the ability to act as reducing sugars. Which process explains this?
    1. AKetose sugars undergo tautomerization.
    2. BThe ketone group is oxidized directly.
    3. CKetose sugars undergo anomerization.
    4. DThe ketone group is reduced directly.
  6. 6What is the product of the following reaction?
    Imagen de la pregunta 6
    1. A1Imagen de la opción A
    2. B2Imagen de la opción B
    3. C3Imagen de la opción C
    4. D4Imagen de la opción D
  7. 7Which of the following enzymes cleaves polysaccharide chains and yields maltose exclusively?
    1. Aα-Amylase
    2. Bβ-Amylase
    3. CDebranching enzyme
    4. DGlycogen phosphorylase
  8. 8When the following straight-chain Fischer projection is converted to a chair or ring conformation, its structure will be:
    1. A1
    2. B2
    3. C3
    4. D4
  9. 9Why is the α-anomer of D-glucose less likely to form than the β-anomer?
    1. AThe β-anomer is preferred for metabolism.
    2. BThe β-anomer undergoes less electron repulsion.
    3. CThe α-anomer is the more stable anomer.
    4. DThe α-anomer forms more in L-glucose.
  10. 10Which two polysaccharides share all of their glucosidic linkage types in common?
    1. ACellulose and amylopectin
    2. BAmylose and glycogen
    3. CAmylose and cellulose
    4. DGlycogen and amylopectin

Información

Descripción
MCAT Biochemistry Test sobre Carbohydrate Structure and Function, creado por Sean Corcoran el 10/07/2016.
Idioma
English
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