往屆細胞考試題

1、豆萁中山大學考研論壇1一、填空題一、填空題(每空每空0.5分，共分，共10分)1.分泌蛋白在內質網中通過加上寡聚糖寡聚糖進行翻譯后修飾。蛋白質1.在內質網內質網和高爾基體高爾基體的腔中被被修飾。分泌蛋白通過出芽出芽并形成蛋白包被蛋白包被小泡小泡進行轉運。有兩種類型的包被小泡，一種是籠形蛋白包被小泡籠形蛋白包被小泡，它介導調節(jié)型調節(jié)型的運輸；另一種是包被蛋白復合體包被蛋白復合體小泡，它介導組成型組成型的運輸。低密度的脂蛋白通過其表面的輔基

2、蛋白輔基蛋白B100與細胞質膜中的受體受體結合，然后通過受體介導的內吞作用受體介導的內吞作用被運進細胞內。2.控制芽殖酵母細胞周期有幾個關卡，其中G1關卡主要受START基因的控制。3.染色質由DNA包裝成染色體壓縮了8400倍，其中壓縮率最高的是從螺線管螺線管壓縮成超螺線管超螺線管，有40倍。4.2002年的生理學醫(yī)學諾貝爾獎頒給了兩位英國科學家和一位美國科學家，以表彰他們?yōu)檠芯科鞴侔l(fā)育和程序性細胞死亡過程中的基因調節(jié)作用基因調節(jié)作用

3、所作出的重大貢獻。5.在線粒體內膜的呼吸鏈上有四種類型的電子載體，它們是∶①鐵硫蛋白鐵硫蛋白；②輔酶輔酶Q；③黃素蛋白黃素蛋白；④細胞色素細胞色素。二、判斷題二、判斷題(正確的標正確的標T，錯誤的標，錯誤的標F或寫出必要的答案，共或寫出必要的答案，共15分)1.IndicatewhethereachofthefollowingstatementsistrueoftheG1phaseofthecellcycletheSphasetheG2

4、phasetheMphase.Agivenstatementmaybetrueofanyallnoneofthephases.（每題0.5分，共5分）(a)TheamountofnuclearDNAinthecelldoubles.(b)Thenuclearenvelopebreaksintofragments.(c)Sisterchromatidsseparatefromeachother.(d)Cellsthatwillneverd

5、ivideagainarelikelytobearrestedinthisphase.(e)Theprimarycellwallofaplantcellfms.(f)Chromosomesarepresentasdiffuseextendedchromatin.(g)Thisphaseispartofinterphase.(h)Mitoticcydinisatitslowestlevel.(i)ACdkproteinispresenti

6、nthecell.(j)Acellcyclecheckpointhasbeenidentifiedinthisphase.Answer:(a)S(b)M(c)M(d)G1(e)M(f)Gl(g)GlG2S``(h)MG2S(i)GlSG2M(j)GlG2M2.同一個體不同組織的細胞中核仁的大小和數目都有很大的變化這種變化和豆萁中山大學考研論壇3d.signalpeptidase3.Whichofthefollowingexplainsw

7、hymicrosomescantbeseenincellsviewedwiththeelectronmicroscope（B）a.Theyarefartoosmall.b.Theyareartifactsofhomogenizationcentrifugation.c.Theyaretransparenttoelectrons.d.Theyactuallycanbeseeninelectronmicrographsofcells.4.I

8、fyoucomparedtheproteinsinacisGolgicompartmentwiththoseinatransGolgicompartmentyouwouldfind:（C）a.theproteinsinthetwocompartmentsareidentical.b.theproteinsintheciscompartmentareglycosylatedcontainmodifiedaminoacidswhereast

9、hoseinthetranscompartmentarenotmodified.c.theproteinsintheciscompartmentareglycosylatedwhereasthoseinthetranscompartmentareglycosylatedcontainmodifiedaminoacids.d.theproteinsoftheciscompartmentareshterthanthoseofthetrans

10、compartment.5.WhichtypeofvesicleofthetransGolgiwkwouldbemostlikelytocarryhmonesdestinedfregulatedsecretion（B）a.lysosomalvesiclesb.clathrincoatedvesiclesc.nonclathrincoatedvesiclesd.alloftheabove6.Ifyoutreatedcellswithadr

11、ugthatinterfereswithmicrotubulessuchascolchicinewhichofthefollowingwouldresult（D）a.Cellshapewouldbedisrupted.b.Mitosismeiosiswouldnotoccur.c.Theintracellularlocationofganelleswouldbedisrupted.d.Alloftheabovewouldresult.7

12、.FirstyoudissolvethemembranefromanintactflagellumusingthedetergentTritonX100.NextyousoaktheaxonemeinasolutioncontainingEDTAwhichremovestheMg2.Whatremainsoftheaxonemeafterthesetreatments（A）a.peripheraltubulesonlyb.periphe