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Florida National University Biochemistry Multiple Choice Questions


  1. uestion 1

    0.25 PointsThe primary difference between the amino acids commonly found in proteins is in their:

  2. Question 2

    0.25 PointsFigure 3-1

    The products of the process in the accompanying figure are:

  3. Question 3

    0.25 PointsUnlike lipids, hydrophilic functional groups typically contain ____ atoms, which make them more soluble in water.

  4. Question 4

    0.25 PointsFigure 3-2

    In the accompanying figure, hydrophobic interactions would occur between the R groups of which two amino acids?

  5. Question 5

    0.25 PointsMatch the molecule with the appropriate word or phrase.PromptsSubmitted Answers

    1. most are nonpolarChoose a match
    2. celluloseChoose a match
    3. consist of monomers having 20 different typesChoose a match
    4. a beta-pleated sheet is one typical structureChoose a match
    5. monomers are joined by a glycosidic linkageChoose a match
    6. contains purines and pyrimidinesChoose a match
    7. may contain thymineChoose a match
    8. cholesterolChoose a match

  6. Question 6

    0.25 PointsGlucose and fructose are ____ because they have identical molecular formulas but their atoms are arranged differently.

  7. Question 7

    0.25 PointsCarotenoids are composed of isoprene subunits.__________________

  8. Question 8

    0.25 PointsAssume that the shaded portions of the molecule in the accompanying figure each represent different polypeptide chains. What does this represent?

  9. Question 9

    0.25 PointsWhen we know what kinds of ____ are present in an organic compound, we can predict its chemical behavior.

  10. Question 10

    0.25 PointsIdentify the levels of organization for protein molecules, and list the type(s) of bond(s) involved in establishing each structural level.

  11. Question 11

    0.25 PointsIf you partially hydrogenate oleic acid, the resulting molecule most likely would:

  12. Question 12

    0.25 PointsAn amino group is weakly basic and includes a(n) ____ atom covalently bonded to two hydrogen atoms.

  13. Question 13

    0.25 PointsChitin is a polymer composed of N-acetyl glucosamine monomers.__________________

  14. Question 14

    0.25 PointsWhat carbohydrate energy storage molecule is found in animal liver and muscle cells?

  15. Question 15

    0.25 PointsFigure 3-1

    What chemical process is represented in the accompanying figure?

  16. Question 16

    0.25 PointsHow many carbon sugars are there in a pentose sugar?

  17. Question 17

    0.25 PointsAnalysis of a certain polymer shows that it contains phosphate groups, ribose groups, and pyrimidines. Based on this information, what statement best describes this compound?

  18. Question 18

    0.25 PointsWhat is the purpose of regulatory proteins?

  19. Question 19

    0.25 PointsAmyloplasts are organelles that store:

  20. Question 20

    0.25 PointsWhat type of protein accelerates the thousands of different chemical reactions thattake place in an organism?

  21. Question 21

    0.25 PointsWhat group of molecules is represented in this structure?

  22. Question 22

    0.25 PointsSickle cell anemia is a genetic disease caused by the replacement of one amino acid in the hemoglobin molecule. This replacement changes the shape and function of the hemoglobin protein in dramatic ways, which can sometimes be lethal. How can the substitution of one amino acid lead to such drastic results?

  23. Question 23

    0.25 PointsA molecule of a saturated triacylglycerol contains:

  24. Question 24

    0.25 PointsIf tyrosine and isoleucine undergo condensation, where does the new bond form?

  25. Question 25

    0.25 PointsIdentify three functions of proteins other than enzymes and briefly discuss or describe each.

  26. Question 26

    0.25 PointsA phosphate group is weakly acidic.__________________

  27. Question 27

    0.25 PointsFigure 3-3

    What type of connection exists between the atoms at the point labeled 1 in the accompanying figure?

  28. Question 28

    0.25 PointsFigure 3-2

    In the accompanying figure, ionic bonds would form between the R groups of which amino acids?

  29. Question 29

    0.25 PointsA beta-pleated sheet is an example of a protein’s tertiary structure.__________________

  30. Question 30

    0.25 PointsA(n) essential amino acid is one that the body cannot synthesize in sufficient amounts.__________________

  31. Question 31

    0.25 PointsWhat substance is removed during a condensation reaction?

  32. Question 32

    0.25 PointsFigure 3-3

    The molecular fragment (the G, U and A’s) represented in the accompanying figure is:

  33. Question 33

    0.25 PointsThe following amino acid would be characterized as ____ based on the chemical properties of its side chain.

  34. Question 34

    0.25 PointsWhat is the purpose of molecular chaperones?

  35. Question 35

    0.25 PointsWhat organic molecules is the primary structural component of cell membranes?

  36. Question 36

    0.25 PointsHow many electron pairs are shared between carbon 2 and 3 in the accompanying figure?

  37. Question 37

    0.25 PointsAt which level of protein structure are peptide bonds most important?

  38. Question 38

    0.25 PointsWhen a nucleic acid undergoes hydrolysis, the resulting subunits are:

  39. Question 39

    0.25 PointsThe helical coil shape of an α-helix fibrous protein provides what type of property to that protein?

  40. Question 40

    0.25 PointsCompare and contrast the structure, physical characteristics, and biological functions of two of the following: fats, steroids, and phospholipids.


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