Exam 3 key - BSCI 110A/Broadie MidTerm Exam #1 SepT 21,...

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Unformatted text preview: BSCI 110A/Broadie MidTerm Exam #1 SepT 21, 2007 Name: Z SIT-F1 MulTiple Choice: There is a single besT answer for each quesTion. Place The IeTTer in The space provided; don'T circle. Each correcT answer is worTh 2 st. 50 st ToTal. C A Typical proTein is besT measured in The following uniTs: A. microns B. micromeTers C. nanomeTers D. angsTroms E. picomeTers E To be mosT sTable, an oxygen aTom needs To acquire This number of elecTrons: A.-2 B.-1C.O D.1E.2 F.3 6.4 H.5 If) E- Which of The following elemenTs is leasT elecTronegaTive? A. oxygen B. niTrogen C. carbon D. hydrogen E. sodium b How many hydrogen bonds does 0 H20 molecule make in pure waTer? A.1 B.2 C.3 D.4 E5 F.6 A Which of The following is qgla polymer of glucose? A. Table sugar B. sTarch C. cellulose D. glycogen E. none of These C An amino acid R group wiTh a meThyI group has The following class properTy: A. charged B. polar C. hydrophobic D. acidic E. basic 8 This amino acid can form covalenT bonds from iTs R group side chain: A. lysine B. cysTeine C. leucine D. valine E. none of These l m In a polypepTide, which covalenT bond doesn_m‘ show flexible roTaTion? A. C” - C B. C - R group C. C - H D. all of These E. none of These 8 The Type of bond ThaT sTabilizes a proTein B—sheeT secondary sTrucTure: A. ionic B. hydrogen C. covalenT D. Van der Waals E. hydrophobic 5 Which secondary sTrucTure forms The mosT flaT proTein sheeT? A. a—sheeT B. B—helix C. parallel [S-sheeT D. anTi-parallel B-sheeT E. y—sheeT B SDS—PAGE separaTes proTeins based on: A. shape B. size C. charge D. amino acid composiTion E. secondary sTrucTure E. AS is a measure of The change in: A. energy B. free energy C. enThalpy D. sTable TemperaTure E. enTropy BSCI 110A/Broadie MidTerm Exam #1 SepT 15, 2006 Name: EEK SI#: H The higher The Km, The lower The: A. enzymeesubsTraTe affiniTy B. AG C. acTivaTion energy D. Vmax A If The K.Eq of a reacTion is 103, Then The reacTion will: A. +AG B. occur sponTaneously C. noT require neT energy inpuT D. noT occur 8 The approximaTe ToTal Thickness of a biological membrane is: A. ~O_5nm B. ~5nm C. ~50 nm D. ~500nm E. 1micron A saTuraTed faTTy acid Tail in a membrane phospholipid: A. forms “kink” B. conTains double bond C. reduces fluidiTy D. increases H-bonds In glycoprofeins, sugars are mosT commonly added To: A. asparagine B. serine and Threonine C. proline D. valine E. lysine The following is always required for acTive Transporf across a membrane: A. energy B. a channel C. a concenTraTion gradienT D. ATP E. co-TransporT The approximaTe fold chan e of Na+ across The plasma membrane: A. 2—fold B. 6-fold C. 15— old D. 50—fold E. IOO-fold This ion movemenT drives acTion poTenTial hyperpolarizaTion: A. Na+ ouT B. K+ in C. Na+ in D. K+ ouT E. boTh A (S: B If you block exocyTosis, you expecT The cell To: A. shrink B. expand C. explode D. B and Then C E. none of These in? I? IV l“ I‘P l? I“ During membrane fusion, The SNARE proTein inTeracTion musT have: A. —AG B. +AG C. direcT ATP hydrolysis D. direcT GTP hydrolysis I: The role of a signal pepTidase is To: A. add signal B. Traffic using signal C. cleave signal D. TranslocaTe signal 0 A claThrin Triskelion is composed of This number of polypepTides: A.1 B_3 C6 D9 E.12 A The TOM/TIM complex is involved in TransporT info: A. miTochondrion B. lysosome C. golgi D. TGN E. ER BSCI 110A/Broadie Midterm Exam #1 Sept 21, 2007 Name: \(EZ I SI#: Experiments: Short answer. Each question worth 5 pts. 20 pts total. 1. Outline 0 general 5-step experiment series in which you start with a pure population of celis in a tube and end with the 3D structure of one specific protein. @ Lysc. Com ‘l-o ngwmwz Mari... @aam dimly-£1 extract rm“ lo wick {with (Calm? ‘lo “WA 9”“ © L “(M “1‘ {MM sns—‘PAGE d CV15 “‘7” “ we a 69 in 'Puxi-E] a why u’/ X'mj A4435” —3 M 2. Describe an experiment to assay a protein‘s movement in a membrane. If the protein fails to move, provide two possible explanations for this observation. flue". sconce. Bewde Ebotoblwhng (PH-AP): Lklaj phi-M, PWl‘o bl-lacla 6‘“ 4"“ til-(l Wl‘flme i M Mml'l‘w (Meagan Vemoo. if m: Hawaii»); ’) pmlmh W3 61 M‘L‘Wl (to lj’WSLclcl-M, 54m) w L) maid A“ h, A 43H amt-$4 Mammy. we), 3. Describe the hypothesis that the 'freeze slammer' was designed to test. Be sure to explain how this machine aIIOWed a rigorous test of the idea. (we aim pmm merMi MM swag. m mm. wig bu rwx‘ll1€¢22~M (4° A Syn/“Psi; w‘ilrl‘la 0. SEN-(- Mus) «fit-(1hr WV: {haulnlulu'l “5994-.ng 4m}: 16 Ilm7¢ 4. Outline the experimental method first used to define the secretory pathway. Name the major steps in this pathway that were identified in this experiment. Lalod will. Himalin amp 44545 4,4 \fwm‘ag 11m}. arlqvblc Maj “M” ml “toUL' lLloLl m a pulso-c m 4.55;. .IWlaJe Sal‘me tolls will! A Pho‘l’ooynplo-‘c Wlsiém 4° ng-l PM“ Pnyag pig'lng-CETCE‘M‘ Emu all, i, - c 1- g 691 Ml W I) 10 \ % Leveling ’3'“ “N {10% lbu 34 VQ'Iclq a (Vela:ng BSCI 110A/Broadie Midterm Exam #1 Sept 21, 2007 Name: “Ex 5I#: Short Essay: Longer answers. Each question is worth 10 pts. 30 pts total. 1. Explain the specific roles of water in 1) dissolving a salt, 2) forming a membrane and 3) determining the 3D structure of a protein. ") H10 «(arms In “Israel: to.“ 5‘“. [ins +0 .1“ ‘ Tlm's allows AWE mi'm to Ai'sa-sswih-l-e M 1159]”, anm 7,) H10 Gm; il—lamals caulk chaJ/Polw ems Low.) M) M101. 1k kafiw 9),.on (gm-WE nmq'vdcmrlive [E AND “do” v‘“ whim “Mair. TL; f-tzSuH' 13 ‘Hv. 103439,, {Wuhh 5F“ m' e, 3) “,0 Cm: Mauls with clwytllpolor M 5:24: clan-{In bwl Ino'l' nan—palm HjA-rwlfiu‘“ 4“" VW““"| 0“ 1+4 Suffice} ijroJPkolficaa's 'AJI.‘ [44.3qu 11-1 ToSul-l— :5 A 91045“ Slwrlwft ‘Untln fl clwpel wfm MA Oily 601e,. 2. If you eat 1) tasty seeds containing ouabain (blocks Na*/l<+ pump) or 2) really, really ' salty sunflower seeds (high Na+), both might impact your digestion of lunch. Explain a predicted outcome on glucose uptake from your intestine in each case. The tmns mwlm’ane Natl“ flfkfim (kink ik (“ks-FILL lumen) is A Sawfly”. of Slrmfi om wall 10:, he Nari-[gluten 53M Poriri—rmspfllw la n"? films Vida oils u? 4‘5 outward?» fr (owl-.144 CI) blocking He PM“? (Mg; loss of“; “‘4 cjmjdwl M1 HAM 41cm. {5 no may” Sou/rite “‘0 ' - ' v ' {win dim-ale LWOSQ‘, unkind-i coy-pt (dim. 3:.“ L1.) my”. H” {0“ qmcwh wk (I'M law, h 3M“ jflAg‘m‘ M H.141“: is Mng AYn‘Iiivy 6*?! Q a‘MDSc \MPM'} . 3. Describe the evidence that golgi organelles arose via an endosymbiotic relationship between a prokaryote (bacterial cell) and primitive eukaryote during early evolution. “in Marlow WM {Vixen do w memoir“; ml claim {owls Mm {rm leach-3.9 fell: owav‘q in prose», Mac double Wlormc, hula/(J Spill-i3“ Md Mambo am. We [3 IM (ML Wtflméfl Su “4-”; Q ggwn‘f W; "n I .1. S ...
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Exam 3 key - BSCI 110A/Broadie MidTerm Exam #1 SepT 21,...

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