BT2 (Q121 - 157)

1. 1The enzyme alcohol dehydrogenase uses a zinc ion for structural support and folding. If this zinc is removed, the resulting enzyme could be referred to as a:

   1. Aholoenzyme
   2. Bhaptoenzyme
   3. Capoenzyme
   4. Dnative enzyme
   5. Enone of the above
2. 2Which of the following amino acid side chains could be dephosphorylated by a phosphate?

   1. ALys
   2. BArg
   3. CThr
   4. DTrp
   5. ENone of the above
3. 3The following molecule is

   

   1. AD-glucose
   2. BL-glucose
   3. CD-galactose
   4. DL-galactose
   5. ED-fructose
   6. FL-fructose
4. 4Which of the following compounds is D- glyceraldehyde?

   

   1. AA
   2. BB
   3. CC
   4. DD
   5. EE
   6. FF
5. 5What is the stereo chemistry of these sugars?

   

   1. AAll D
   2. BAll L
   3. CA mixture of D and L
   4. Dnone of these
   5. Eyou can't tell from only these structures
6. 6Which of the following is an epimer of glucose?

   

   1. AA
   2. BB
   3. CC
   4. DD
   5. EE
   6. Fnone of these
7. 7The following molecule is:

   

   1. Aalpha-D-glucopyranose
   2. Bbeta-D-glucopyranose
   3. Calpha-D-ribopyranose
   4. Dbeta-D-g ribopyranose
   5. Ebeta-D-fructofuranose
   6. Fnone of the above
8. 8What is the following structure?

   

   1. AAlpha glucopyranose
   2. BBeta glucopyranose
   3. CAlpha glucofuranose
   4. DBeta glucofuranose
   5. EBeta fructofuranose
   6. FNone of the above
9. 9The molecule shown below is:

   

   1. Abeta-D-Fructose
   2. Balpha -D-Fructose
   3. Cbeta -D-Glucose
   4. Dalpha -D-Ribose
   5. Ebeta -D-Ribose
10. 10Pentoses and hexoses will cyclize to:

    1. AFuranoses and pyranoses, respectively
    2. BBoth will cyclize to either furanoses or pyranoses
    3. CPyranoses and furanoses, respectively
    4. DPentoses only to furanoses, hexoses to both

11. 11What is the most plausible reason that glucose is the most commonly found sugar?

    1. AIt’s more easily recognized than other sugars
    2. BIt provides more hydrogen bonding capacity than other hexoses
    3. CIn one chair conformation its hydroxyl’s are all equatorial
    4. DIt’s anomeric carbon is more reactive than other sugars
12. 12The type of glycoside bond in the molecule shown below is:

    

    1. AN-glycoside
    2. BAlpha 1-6
    3. CBeta 1-6
    4. DAlpha 1-5
    5. EBeta 1-5
13. 13Which of the following best describes why the annomeric carbon is reactive?

    1. AThe hydroxyl attached to this carbon can point up or down
    2. BThis carbon has two bonds to oxygen
    3. CThis carbon is found at the top of the pyranose chair conformation
    4. DThis carbon is more easily modified
14. 14Which of the following statements about the anomeric carbon in the ring form of a hexose sugar is FALSE?

    1. Athe anomeric carbon is bonded to two oxygens
    2. Bthe anomeric carbon is always derived from carbon #1 of the hexose
    3. Cthe anomeric carbon can be in the alpha or beta configuration
    4. Dthe anomeric carbon can be involved in glycoside bonds
    5. Ethe anomeric carbon is derived from the carbonyl group of the linear form
15. 15Maltose has a glycosidic linkage also found it which polysaccharide?

    1. ACellulose
    2. BStarch
    3. CGlycogen
    4. DMutan
    5. EChitin
    6. FStarch and Glycogen
16. 16The conversion of alpha-D-Glucopyranose to beta-D-Glucopyranose is an example of what kind of chemistry?

    1. Atransketolation
    2. Bisomerization
    3. Coxidation
    4. Dreduction
    5. Emutarotation
17. 17Glycoproteins have sugars generally attached to which amino acid side chains?

    1. Aserine, threonine, and asparagine
    2. BTyrosine and asparagine
    3. Cnone of the above is correct
    4. Dserine and threonine
    5. Eserine, tyrosine, and asparagine
18. 18When carbohdyrates are linked to proteins by an N-glycoside bond, the amino acid that is involved in the linkage is:

    1. Aserine
    2. Bthreonine
    3. Casparagine
    4. Dhistidine
    5. Elysine
19. 19When carbohydrates are linked to proteins by an O-glycoside bond, the amino acid(s) that is involved in the linkage is:

    1. Aserine or threonine
    2. Bcysteine
    3. Casparagine
    4. Dhistidine
    5. Elysine
20. 20This disaccharide sucrose is composted of

    1. AGlucose and fructose
    2. BFlucose and galactose
    3. CGalactose and maltose
    4. DAll of the above
    5. ENone of the above
21. 21The disaccharide maltose is composed of

    1. AGlucose and fructose
    2. BGlucose and galactose
    3. CGlucose and glucose
    4. DFructose and fructose
    5. ENone of the above
22. 22The disaccharide cellobiose is composed of:

    1. Aglucose and fructose
    2. Bglucose and galactose
    3. Cglucose
    4. Dfructose
    5. Enone of the above
23. 23Cellobiose and maltose differ in what regard

    1. ATheir constituent simple sugars
    2. BThe stereochemistry of their glycosidic linkages
    3. CTheir degrees of polymerization
    4. DTheir degrees of branching
    5. ENone of the above
24. 24Maltose and amylose differ in what regard

    1. Atheir constituent simple sugars
    2. Bthe stereochemistry of their glycosidic linkages
    3. Ctheir degress of polymerization
    4. Dtheir degrees of branching
    5. Enone of the above
25. 25Cellobiose and cellulose differ in what regard

    1. Atheir constituent simple sugars
    2. Bthe stereochemistry of their glycosidic linkages
    3. Ctheir degrees of polymerization
    4. Dtheir degrees of branching
    5. Enone of the above
26. 26Amylopectin and amylose are the principle components of

    1. ACellulose
    2. BStarch
    3. CInsect Cell Walls
    4. DGlycogen
    5. ENone of the Above
27. 27The polysaccharide energy storage compound found in plants is:

    1. Acellulose
    2. Bchitin
    3. Chyaluronic acid
    4. Dglycogen
    5. Estarch
28. 28The most abundant polysaccharide energy storage compound found in humans is

    1. Acellulose
    2. Bchitin
    3. Chyaluronic acid
    4. Dglycogen
    5. Estarch
29. 29Amylopectin most closely resembles which polysaccharide

    1. Acelluose
    2. Bglycogen
    3. Cchitin
    4. Dpeptidoglycan
    5. Emutan
30. 30Which of the following is NOT a function mediated by glycosylation of glycoproteins?

    1. ASorting signal
    2. BProtein stability
    3. CProtein folding
    4. DAll of these are functions of protein glycosylation
    5. ECell-cell adhesion
31. 31The oligosaccharides in glycoproteins are

    1. Akey mediators of catalytic activity
    2. Bstatic structures that strictly serve a structural role
    3. Cenormous carbohydrates chains that strengthen the extracellular matrix
    4. Ddynamic structures that can be involved in organelle retention and targeting
32. 32In N-linked glycosylation the resulting oligosaccharides can be best described as

    1. Ahaving a core structure in common
    2. Bbeing attached to asparagine in exposed NX(S/T) motifs
    3. Cbeing synthesized in the cytosol and ER, then trimmed in the ER and golgi
    4. Dall of the above
33. 33Cell surface carbohydrates are involved in

    1. Acell-cell contact
    2. Ball of these
    3. Cbacterial contact
    4. Dimmune self/non-self recognition
    5. Evirus contact
34. 34What type of glycoprotein glycosidic linkages occur at specific sequence motifs?

    1. AN-linked
    2. BO-linked
    3. CS-linked
35. 35The “ABO” blood group antigens are best described as

    1. AProteins
    2. BLipids
    3. CGlycoproteins
    4. DStarch
    5. ECellobiose
36. 36A person with type “O” blood makes which antibodies?

    1. AA
    2. BB
    3. CO
    4. DA and B
    5. ENone of these
37. 37A person with type “AB” blood makes which antibodies

    1. AA
    2. BB
    3. CO
    4. DA and B
    5. ENone of these

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Quiz am BT2 (Q121 - 157), erstellt von dummy dummy am 19/10/2018.

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