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1.關于基因表達的含義,錯誤的是()。HTMLCONTROLForms.HTML:Option.1A某些基因表達經歷的轉錄和翻譯過程HTMLCONTROLForms.HTML:Option.1B包括DNA合成過程HTMLCONTROLForms.HTML:Option.1C某些基因的表達產物為蛋白質HTMLCONTROLForms.HTML:Option.1D某些基因的表達產物為RNAHTMLCONTROLForms.HTML:Option.1E某些基因表達的產物可以不是蛋白質正確答案:BHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.12.體內蛋白質分解代謝的最終產物是()。HTMLCONTROLForms.HTML:Option.1A氨基酸HTMLCONTROLForms.HTML:Option.1B肽類HTMLCONTROLForms.HTML:Option.1CCO2、H2O和尿素HTMLCONTROLForms.HTML:Option.1D氨基酸、胺類、尿酸HTMLCONTROLForms.HTML:Option.1E肌酐、肌酸正確答案:CHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.13.DNA復制時下列哪一種酶是不需要的?()HTMLCONTROLForms.HTML:Option.1ADNA聚合酶HTMLCONTROLForms.HTML:Option.1BRNA聚合酶HTMLCONTROLForms.HTML:Option.1C連接酶HTMLCONTROLForms.HTML:Option.1D拓撲異構酶HTMLCONTROLForms.HTML:Option.1E解鏈酶正確答案:BHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.14.大腸桿菌DNA復制中催化新鏈延長的酶是()。HTMLCONTROLForms.HTML:Option.1ADNApolⅠHTMLCONTROLForms.HTML:Option.1BDNApolⅡHTMLCONTROLForms.HTML:Option.1CDNApolⅢHTMLCONTROLForms.HTML:Option.1DDNA連接酶HTMLCONTROLForms.HTML:Option.1E引物酶正確答案:CHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.15.有關真核生物蛋白質生物合成敘述錯誤的是()。HTMLCONTROLForms.HTML:Option.1A肽鏈合成后需經過加工修飾HTMLCONTROLForms.HTML:Option.1B以20種氨基酸為原料HTMLCONTROLForms.HTML:Option.1C作為模版的mRNA需要SD序列HTMLCONTROLForms.HTML:Option.1D三種RNA參與蛋白質的生物合成HTMLCONTROLForms.HTML:Option.1E蛋白質的合成部位是在胞液的核糖體上正確答案:CHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.16.下列哪種氨基酸與鳥氨酸循環(huán)無關?()HTMLCONTROLForms.HTML:Option.1A賴氨酸HTMLCONTROLForms.HTML:Option.1B天冬氨酸HTMLCONTROLForms.HTML:Option.1C瓜氨酸HTMLCONTROLForms.HTML:Option.1D精氨酸HTMLCONTROLForms.HTML:Option.1E鳥氨酸正確答案:AHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.17.關于蛋白質合成錯誤的敘述是()。HTMLCONTROLForms.HTML:Option.1A氨基酸與rRNA共價相連HTMLCONTROLForms.HTML:Option.1B20種氨基酸都有相應的密碼HTMLCONTROLForms.HTML:Option.1C氨基酸與tRNA3’端連接HTMLCONTROLForms.HTML:Option.1DmRNA是多肽連合成的直接模板HTMLCONTROLForms.HTML:Option.1E核糖體是蛋白質翻譯的場所正確答案:AHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.18.原核生物DNA復制終止涉及到()。HTMLCONTROLForms.HTML:Option.1ATus蛋白加強解鏈酶的作用HTMLCONTROLForms.HTML:Option.1BRNA酶水解引物HTMLCONTROLForms.HTML:Option.1C不需要DNA聚合酶HTMLCONTROLForms.HTML:Option.1D連接酶的作用不需要消耗能量HTMLCONTROLForms.HTML:Option.1E有多個復制終止點正確答案:BHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.19.RNA引物在DNA復制中的作用是()。HTMLCONTROLForms.HTML:Option.1A提供起始的模版HTMLCONTROLForms.HTML:Option.1B激活引物酶HTMLCONTROLForms.HTML:Option.1C提供DNA聚合酶所需的5'磷酸端HTMLCONTROLForms.HTML:Option.1D提供DNA聚合酶所需的3'羥基端HTMLCONTROLForms.HTML:Option.1E提供DNA聚合酶所需的能量正確答案:DHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.110.細胞中DNA復制時所遵守的是()。HTMLCONTROLForms.HTML:Option.1ADNA聚合酶可以催化5'→3'和3‘→5’兩個方向的新鏈聚合HTMLCONTROLForms.HTML:Option.1B每次只能以親代DNA一條鏈作為模板HTMLCONTROLForms.HTML:Option.1C以3‘→5’方向的親代DNA鏈作模板的子代鏈在復制時基本上是不連續(xù)進行的HTMLCONTROLForms.HTML:Option.1D新鏈合成時與模板鏈堿基互補配對存在擺動性HTMLCONTROLForms.HTML:Option.1E隨從鏈的合成中產生了岡崎片段正確答案:EHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.111.關于逆轉錄描述正確的是()。HTMLCONTROLForms.HTML:Option.1A屬于RNA病毒的遺傳方式HTMLCONTROLForms.HTML:Option.1B只能在病毒內完成HTMLCONTROLForms.HTML:Option.1C產物是RNAHTMLCONTROLForms.HTML:Option.1D其發(fā)現(xiàn)否定了中心法則HTMLCONTROLForms.HTML:Option.1E在實驗室中主要用來合成病毒正確答案:AHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.112.人體內合成尿素的主要臟器是()。HTMLCONTROLForms.HTML:Option.1A腦HTMLCONTROLForms.HTML:Option.1B肌組織HTMLCONTROLForms.HTML:Option.1C肺HTMLCONTROLForms.HTML:Option.1D肝HTMLCONTROLForms.HTML:Option.1E心正確答案:DHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.113.尿素循環(huán)中尿素的兩個氮來自下列哪個化合物?()HTMLCONTROLForms.HTML:Option.1A氨基甲酰磷酸及天冬氨酸HTMLCONTROLForms.HTML:Option.1B氨基甲酰磷酸及鳥氨酸HTMLCONTROLForms.HTML:Option.1C鳥氨酸的α-氨基及γ-氨基HTMLCONTROLForms.HTML:Option.1D鳥氨酸的γ-氨基及甘氨酸HTMLCONTROLForms.HTML:Option.1E瓜氨酸的α-氨基及精氨酸的α-氨基正確答案:AHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.114.根據遺傳中心法則,生物遺傳信息流的方向是()。HTMLCONTROLForms.HTML:Option.1AmRNA→DNA→蛋白質HTMLCONTROLForms.HTML:Option.1BtRNA→mRNA→DNAHTMLCONTROLForms.HTML:Option.1CDNA→mRNA→蛋白質HTMLCONTROLForms.HTML:Option.1DDNA→tRNA→mRNA→蛋白質HTMLCONTROLForms.HTML:Option.1E蛋白質→mRNA→DNA正確答案:CHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.115.關于體內脫氨基作用描述正確的是()。HTMLCONTROLForms.HTML:Option.1A氧化脫氨基作用是最主要的形式HTMLCONTROLForms.HTML:Option.1B轉氨酶需要NAD+作為輔助因子HTMLCONTROLForms.HTML:Option.1C骨骼肌中主要以嘌呤核苷酸循環(huán)脫去氨基HTMLCONTROLForms.HTML:Option.1D轉氨基作用可產生游離的氨HTMLCONTROLForms.HTML:Option.1EGPT,又稱ALT主要存在于心肌中正確答案:CHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.116.能編碼阻遏蛋白合成的是()。HTMLCONTROLForms.HTML:Option.1A操縱基因HTMLCONTROLForms.HTML:Option.1B調節(jié)基因HTMLCONTROLForms.HTML:Option.1C啟動子HTMLCONTROLForms.HTML:Option.1D結構基因HTMLCONTROLForms.HTML:Option.1E增強子正確答案:BHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.117.擺動配對是指以下配對不穩(wěn)定()。HTMLCONTROLForms.HTML:Option.1A反密碼的第1位堿基與密碼的第3位HTMLCONTROLForms.HTML:Option.1B反密碼的第3位堿基與密碼的第1位HTMLCONTROLForms.HTML:Option.1C反密碼的第3位堿基與密碼的第3位HTMLCONTROLForms.HTML:Option.1D反密碼的第3位堿基與密碼的第2位HTMLCONTROLForms.HTML:Option.1E反密碼的第1位堿基與密碼的第1位正確答案:AHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.118.勞動或運動時,ATP因消耗而大量減少,此時()。HTMLCONTROLForms.HTML:Option.1AADP相應增加,ATP/ADP下降,呼吸隨之加快,氧化磷酸化升高HTMLCONTROLForms.HTML:Option.1BADP大量減少,ATP/ADP增高,呼吸隨之加快HTMLCONTROLForms.HTML:Option.1CADP大量磷酸化,以維持ATP/ADP不變HTMLCONTROLForms.HTML:Option.1DADP相應減少,以維持ATP/ADP恢復正常HTMLCONTROLForms.HTML:Option.1E磷酸肌酸在體內大量增加正確答案:AHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.119.參與呼吸鏈遞電子的金屬離子是()。HTMLCONTROLForms.HTML:Option.1A鎂離子HTMLCONTROLForms.HTML:Option.1B鐵離子HTMLCONTROLForms.HTML:Option.1C鉬離子HTMLCONTROLForms.HTML:Option.1D鈷離子HTMLCONTROLForms.HTML:Option.1E銅離子正確答案:BHTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.120.最直接聯(lián)系核苷酸合成與糖代謝的物質是()。HTMLCONTROLForms.HTML:Option.1A葡萄糖HTMLCONTROLForms.HTML:Option.1B6-磷酸葡萄糖HTMLCONTROLForms.HTML:Option.1C1-磷酸葡萄糖HTMLCONTROLForms.HTML:Option.1D1.6-二磷酸果糖HTMLCONTROLForms.HTML:Option.1E5-磷酸核糖正確答案:BHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.121.人體內各種活動的直接能量供給者是()。HTMLCONTROLForms.HTML:Option.1A萄萄糖HTMLCONTROLForms.HTML:Option.1B脂肪酸HTMLCONTROLForms.HTML:Option.1CATPHTMLCONTROLForms.HTML:Option.1D乙酰CoAHTMLCONTROLForms.HTML:Option.1E蛋白質正確答案:CHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.122.生物體遺傳密碼個數()。HTMLCONTROLForms.HTML:Option.1A16HTMLCONTROLForms.HTML:Option.1B64HTMLCONTROLForms.HTML:Option.1C60HTMLCONTROLForms.HTML:Option.1D61HTMLCONTROLForms.HTML:Option.1E20正確答案:BHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.123.外顯子是()。HTMLCONTROLForms.HTML:Option.1A基因突變的表現(xiàn)HTMLCONTROLForms.HTML:Option.1B斷裂開的DNA片段HTMLCONTROLForms.HTML:Option.1C不轉錄的DNA片段HTMLCONTROLForms.HTML:Option.1D真核生物基因中為蛋白質編碼的序列HTMLCONTROLForms.HTML:Option.1E真核生物基因的非編碼序列正確答案:DHTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.124.大腸桿菌RNA聚合酶全酶分子中負責識別啟動子的亞基是()。HTMLCONTROLForms.HTML:Option.1Aα亞基HTMLCONTROLForms.HTML:Option.1Bβ亞基HTMLCONTROLForms.HTML:Option.1Cββ'亞基HTMLCONTROLForms.HTML:Option.1Dαβ亞基HTMLCONTROLForms.HTML:Option.1Eσ亞基正確答案:EHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.125.轉錄所需要的原料是()。HTMLCONTROLForms.HTML:Option.1ANMPHTMLCONTROLForms.HTML:Option.1BNTPHTMLCONTROLForms.HTML:Option.1CNDPHTMLCONTROLForms.HTML:Option.1DdNTPHTMLCONTROLForms.HTML:Option.1EdNMP正確答案:BHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.126.DNA復制中,RNA引物的作用是()。HTMLCONTROLForms.HTML:Option.1A活化DNApolⅢHTMLCONTROLForms.HTML:Option.1B促使DNA雙鏈解開HTMLCONTROLForms.HTML:Option.1C提供5'-P末端作合成DNA鏈的起點HTMLCONTROLForms.HTML:Option.1D提供3'-OH末端作合成RNA鏈的起點HTMLCONTROLForms.HTML:Option.1E提供3'-OH末端作合成DNA鏈的起點正確答案:EHTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.127.RNA生物合成中包括下列哪種結合?()HTMLCONTROLForms.HTML:Option.1ADNA聚合酶與DNA結合HTMLCONTROLForms.HTML:Option.1BRNA聚合酶與DNA結合HTMLCONTROLForms.HTML:Option.1Cσ因子與RNA結合HTMLCONTROLForms.HTML:Option.1D解鏈蛋白與RNA結合HTMLCONTROLForms.HTML:Option.1E起動因子與DNA聚合酶結合正確答案:BHTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.128.關于岡崎片段描述正確的是()。HTMLCONTROLForms.HTML:Option.1ADNA復制時隨從鏈合成產生的一段一段新鏈DNAHTMLCONTROLForms.HTML:Option.1BDNA復制時由于基因突變導致的合成不完全而產生的DNA片段HTMLCONTROLForms.HTML:Option.1CDNA降解時產生的片段HTMLCONTROLForms.HTML:Option.1D只有原核生物才有岡崎片段的存在HTMLCONTROLForms.HTML:Option.1E只有真核生物才有岡崎片段的存在正確答案:AHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.129.hnRNA轉變?yōu)閙RNA的過程是()。HTMLCONTROLForms.HTML:Option.1A轉錄起始HTMLCONTROLForms.HTML:Option.1B轉錄終止HTMLCONTROLForms.HTML:Option.1C轉錄后加工HTMLCONTROLForms.HTML:Option.1D復制起始HTMLCONTROLForms.HTML:Option.1E翻譯起始正確答案:CHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.130.關于痛風癥的描述不正確的是()。HTMLCONTROLForms.HTML:Option.1A患者需要進食高核酸食物作為營養(yǎng)補充物HTMLCONTROLForms.HTML:Option.1B尿酸鹽晶體可在關節(jié)等處沉積HTMLCONTROLForms.HTML:Option.1C可能引起尿路結石及腎疾病HTMLCONTROLForms.HTML:Option.1D臨床上常用別嘌呤醇治療痛風癥HTMLCONTROLForms.HTML:Option.1E由于某些嘌呤核苷酸代謝相關酶遺傳性缺陷引起正確答案:AHTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.131.關于cAMP在基因表達調控中的作用,正確的是()。HTMLCONTROLForms.HTML:Option.1AcAMP轉變?yōu)镃APHTMLCONTROLForms.HTML:Option.1BCAP轉變?yōu)閏AMPHTMLCONTROLForms.HTML:Option.1CcAMP與CAP形成復合物HTMLCONTROLForms.HTML:Option.1D葡萄糖分解活躍,使cAMP增加,補充能源HTMLCONTROLForms.HTML:Option.1EcAMP是激素作用的第二信使,與轉錄無關正確答案:CHTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.132.原核生物參與轉錄起始的酶是()。HTMLCONTROLForms.HTML:Option.1A解鏈酶HTMLCONTROLForms.HTML:Option.1B引物酶HTMLCONTROLForms.HTML:Option.1CRNA聚合酶ⅢHTMLCONTROLForms.HTML:Option.1DRNA聚合酶全酶HTMLCONTROLForms.HTML:Option.1ERNA聚合酶核心酶正確答案:DHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.133.不屬于DNA復制起始所需的物質是()。HTMLCONTROLForms.HTML:Option.1A引物酶HTMLCONTROLForms.HTML:Option.1B單鏈結合蛋白HTMLCONTROLForms.HTML:Option.1C拓撲異構酶HTMLCONTROLForms.HTML:Option.1D解鏈酶HTMLCONTROLForms.HTML:Option.1E連接酶正確答案:EHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.134.在蛋白質生物合成中催化氨基酸之間形成肽鍵的酶是()。HTMLCONTROLForms.HTML:Option.1A氨基酸合成酶HTMLCONTROLForms.HTML:Option.1B氨基肽酶HTMLCONTROLForms.HTML:Option.1C羧基肽酶HTMLCONTROLForms.HTML:Option.1D轉肽酶HTMLCONTROLForms.HTML:Option.1E氨基酸連接酶正確答案:DHTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.135.在乳糖操縱子中,阻遏蛋白結合在下列哪個序列上?()HTMLCONTROLForms.HTML:Option.1A結構基因AHTMLCONTROLForms.HTML:Option.1B調節(jié)基因IHTMLCONTROLForms.HTML:Option.1C操縱序列OHTMLCONTROLForms.HTML:Option.1D啟動序列PHTMLCONTROLForms.HTML:Option.1E結構基因Z正確答案:CHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.136.下列哪一項是DNA損傷后的正確修復行為?()HTMLCONTROLForms.HTML:Option.1A光修復酶可被紫外光激活HTMLCONTROLForms.HTML:Option.1B切除修復是將有損傷DNA整條鏈從細胞中切除HTMLCONTROLForms.HTML:Option.1C重組修復是當DNA分子的損傷面積較大時發(fā)生的一種修復方式HTMLCONTROLForms.HTML:Option.1D重組修復是一種無差錯修復HTMLCONTROLForms.HTML:Option.1ESOS修復是需要沒有發(fā)生DNA損傷的細胞協(xié)作進行的修復方式正確答案:CHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.137.下列mRNA的論述,哪一項是正確的?()HTMLCONTROLForms.HTML:Option.1AmRNA遺傳密碼的閱讀方向是3’→5’HTMLCONTROLForms.HTML:Option.1BmRNA是基因表達的最終產物HTMLCONTROLForms.HTML:Option.1C每條mRNA有三個終止密碼HTMLCONTROLForms.HTML:Option.1DmRNA密碼子與tRNA反密碼子都以A-T,G-C配對結合HTMLCONTROLForms.HTML:Option.1EmRNA遺傳密碼的方向是5’→3’正確答案:EHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.138.在尿素合成過程中,氨基甲酰磷酸()。HTMLCONTROLForms.HTML:Option.1A由CPS-Ⅱ催化合成HTMLCONTROLForms.HTML:Option.1B不是高能化合物HTMLCONTROLForms.HTML:Option.1C在線粒體內合成HTMLCONTROLForms.HTML:Option.1D合成過程中并不耗能HTMLCONTROLForms.HTML:Option.1E是CPS-Ⅰ的別構激活劑正確答案:CHTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.139.大腸桿菌DNApolⅠ具有下列哪一種性質?()HTMLCONTROLForms.HTML:Option.1A外切核酸酶活性HTMLCONTROLForms.HTML:Option.1B內切核酸酶活性HTMLCONTROLForms.HTML:Option.1C催化兩個岡崎片段間生成磷酸二酯鍵HTMLCONTROLForms.HTML:Option.1D能以dNTP作為它的底物,催化合成RNA片段HTMLCONTROLForms.HTML:Option.1E兼具DNA聚合酶及解鏈酶活性正確答案:AHTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.140.下列何處是新進的氨酰-tRNA的結合部位?()HTMLCONTROLForms.HTML:Option.1A核糖體的D位HTMLCONTROLForms.HTML:Option.1B核糖體的P位HTMLCONTROLForms.HTML:Option.1C核糖體小亞基HTMLCONTROLForms.HTML:Option.1D核糖體的A位HTMLCONTROLForms.HTML:Option.1E釋放因子正確答案:DHTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.141.人體內氨基酸脫氨基的主要方式是()。HTMLCONTROLForms.HTML:Option.1A轉氨基作用HTMLCONTROLForms.HTML:Option.1B氧化脫氨基作用HTMLCONTROLForms.HTML:Option.1C聯(lián)合脫氨基作用HTMLCONTROLForms.HTML:Option.1D還原脫氨HTMLCONTROLForms.HTML:Option.1E脫羧基作用正確答案:CHTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.142.體內氨基酸作為蛋白質合成的原料時,其活化形式為()。HTMLCONTROLForms.HTML:Option.1A糖基化HTMLCONTROLForms.HTML:Option.1B磷酸化HTMLCONTROLForms.HTML:Option.1C由四氫葉酸攜載HTMLCONTROLForms.HTML:Option.1D生成氨基酰tRNAHTMLCONTROLForms.HTML:Option.1E生成酯?;被嵴_答案:DHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.143.不對稱轉錄是指()。HTMLCONTROLForms.HTML:Option.1A雙向復制后的轉錄HTMLCONTROLForms.HTML:Option.1B同一單鏈DNA模板轉錄時可從5′→3′延長或從3′→5′延長HTMLCONTROLForms.HTML:Option.1C不同基因的模板鏈并非永遠在同一DNA單鏈上HTMLCONTROLForms.HTML:Option.1D轉錄經翻譯生成多肽中的氨基酸含有不對稱碳原子HTMLCONTROLForms.HTML:Option.1E沒有規(guī)律的轉錄正確答案:CHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.144.下列關于mRNA的敘述錯誤的是()。HTMLCONTROLForms.HTML:Option.1A原核細胞的mRNA在翻譯開始前加多聚A尾HTMLCONTROLForms.HTML:Option.1B在原核細胞的許多mRNA攜帶著幾個多肽的結構信息HTMLCONTROLForms.HTML:Option.1C真核細胞mRNA在5'端攜有特殊的“帽子”結構HTMLCONTROLForms.HTML:Option.1D真核細胞轉錄生成的mRNA經常被“加工”HTMLCONTROLForms.HTML:Option.1E真核細胞mRNA是由RNA聚合酶Ⅱ催化合成的正確答案:AHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.145.蛋白質生物合成的肽鏈延長過程不包括下列哪個過程?()HTMLCONTROLForms.HTML:Option.1A氨基酰-tRNA根據遺傳密碼的指引,進入核蛋白體的A位HTMLCONTROLForms.HTML:Option.1BA位上的氨基酸形成肽鍵HTMLCONTROLForms.HTML:Option.1CP位上無負載的tRNA脫落,P位空載HTMLCONTROLForms.HTML:Option.1D氨基酸脫落HTMLCONTROLForms.HTML:Option.1E轉位正確答案:DHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.146.下列關于遺傳密碼的基本特點,哪一點是錯誤的?()HTMLCONTROLForms.HTML:Option.1A密碼無標點HTMLCONTROLForms.HTML:Option.1B一種氨基酸只有一種遺傳密碼HTMLCONTROLForms.HTML:Option.1C有終止密碼和起始密碼HTMLCONTROLForms.HTML:Option.1D密碼專一性主要由頭兩個堿基決定HTMLCONTROLForms.HTML:Option.1E病毒、原核細胞或真核細胞都利用同一套遺傳密碼正確答案:BHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.147.DNA基因有兩條鏈,與mRNA序列相同(除T代替U外)的鏈叫做()。HTMLCONTROLForms.HTML:Option.1A模板鏈HTMLCONTROLForms.HTML:Option.1B編碼鏈HTMLCONTROLForms.HTML:Option.1C重鏈HTMLCONTROLForms.HTML:Option.1DcDNA鏈HTMLCONTROLForms.HTML:Option.1E輕鏈正確答案:BHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.148.不參與組成呼吸鏈的化合物是()。HTMLCONTROLForms.HTML:Option.1ACoQHTMLCONTROLForms.HTML:Option.1BFADHTMLCONTROLForms.HTML:Option.1CCytbHTMLCONTROLForms.HTML:Option.1D生物素HTMLCONTROLForms.HTML:Option.1E鐵硫蛋白正確答案:DHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.149.誘導乳糖操縱子轉錄的物質是()。HTMLCONTROLForms.HTML:Option.1A核糖HTMLCONTROLForms.HTML:Option.1B乳糖HTMLCONTROLForms.HTML:Option.1C阿拉伯糖HTMLCONTROLForms.HTML:Option.1D阻遏蛋白HTMLCONTROLForms.HTML:Option.1E葡萄糖正確答案:BHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.150.原核生物轉錄的終止因子是()。HTMLCONTROLForms.HTML:Option.1AαHTMLCONTROLForms.HTML:Option.1BρHTMLCONTROLForms.HTML:Option.1CβHTMLCONTROLForms.HTML:Option.1DσHTMLCONTROLForms.HTML:Option.1Eγ正確答案:BHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.151.氨基酰-tRNA合成酶的特點正確的是()。HTMLCONTROLForms.HTML:Option.1A催化反應需要GTPHTMLCONTROLForms.HTML:Option.1B存在細胞核中HTMLCONTROLForms.HTML:Option.1C對氨基酰與tRNA都有專一性HTMLCONTROLForms.HTML:Option.1D直接生成甲酰蛋氨酰-tRNAHTMLCONTROLForms.HTML:Option.1E只對氨基酸有專一性正確答案:CHTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.152.真核細胞mRNA轉錄后需要進行的5′端加工過程是()。HTMLCONTROLForms.HTML:Option.1A加帽子HTMLCONTROLForms.HTML:Option.1B加聚A尾HTMLCONTROLForms.HTML:Option.1C剪切和剪接HTMLCONTROLForms.HTML:Option.1DRNA編輯HTMLCONTROLForms.HTML:Option.1E不加帽子正確答案:AHTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.153.下列哪些成分不是操縱子的組成部分?()HTMLCONTROLForms.HTML:Option.1A結構基因HTMLCONTROLForms.HTML:Option.1B啟動子HTMLCONTROLForms.HTML:Option.1C延長因子HTMLCONTROLForms.HTML:Option.1DPribnow盒HTMLCONTROLForms.HTML:Option.1E操縱基因正確答案:CHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.154.按照氨中毒學說,肝昏迷是由于氨引起腦細胞()。HTMLCONTROLForms.HTML:Option.1A三羧酸循環(huán)減慢HTMLCONTROLForms.HTML:Option.1B糖酵解減慢HTMLCONTROLForms.HTML:Option.1C脂肪堆積HTMLCONTROLForms.HTML:Option.1D尿素合成障礙HTMLCONTROLForms.HTML:Option.1E磷酸戊糖途徑受阻正確答案:AHTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.155.與三羧酸循環(huán)中的草酰乙酸相似,在合成尿素中既是起點又是終點的物質是()。HTMLCONTROLForms.HTML:Option.1A鳥氨酸HTMLCONTROLForms.HTML:Option.1B天冬氨酸HTMLCONTROLForms.HTML:Option.1C瓜氨酸HTMLCONTROLForms.HTML:Option.1D精氨酸HTMLCONTROLForms.HTML:Option.1E絲氨酸正確答案:AHTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.156.下列哪一種物質是體內氨的儲存和運輸形式?()HTMLCONTROLForms.HTML:Option.1A谷氨酸HTMLCONTROLForms.HTML:Option.1B谷氨酰胺HTMLCONTROLForms.HTML:Option.1C谷胱甘肽HTMLCONTROLForms.HTML:Option.1D天門冬酰胺HTMLCONTROLForms.HTML:Option.1E銨鹽正確答案:BHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.157.DNA拓撲異構酶的作用是()。HTMLCONTROLForms.HTML:Option.1A解開DNA雙螺旋中互補堿基HTMLCONTROLForms.HTML:Option.1B松弛DNA超螺旋,引起拓撲異構反應HTMLCONTROLForms.HTML:Option.1C辨認復制起始點HTMLCONTROLForms.HTML:Option.1D穩(wěn)定解開雙鏈的DNAHTMLCONTROLForms.HTML:Option.1E引入正超螺旋,有利雙鏈解開正確答案:BHTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.158.嘌呤核苷酸從頭合成的原料不包括()。HTMLCONTROLForms.HTML:Option.1AR-5′-PHTMLCONTROLForms.HTML:Option.1B一碳單位HTMLCONTROLForms.HTML:Option.1C天冬氨酸、甘氨酸HTMLCONTROLForms.HTML:Option.1DGln、CO2HTMLCONTROLForms.HTML:Option.1ES-腺苷蛋氨酸嘌呤核苷正確答案:EHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.159.哪一項是對“基因”的正確描述?()HTMLCONTROLForms.HTML:Option.1A基因指一條DNA分子中的全部核苷酸排列順序HTMLCONTROLForms.HTML:Option.1B每一個基因都能編碼幾條多肽鏈HTMLCONTROLForms.HTML:Option.1C基因指DNA分子中一個功能性片段HTMLCONTROLForms.HTML:Option.1D生物體細胞中全部染色體RNA總和稱為基因組HTMLCONTROLForms.HTML:Option.1E基因的本質是蛋白質正確答案:CHTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.160.不參與蛋白質合成的物質是()。HTMLCONTROLForms.HTML:Option.1A轉錄酶HTMLCONTROLForms.HTML:Option.1B起始因子HTMLCONTROLForms.HTML:Option.1C三種RNAHTMLCONTROLForms.HTML:Option.1D氨基酰-tRNA合成酶HTMLCONTROLForms.HTML:Option.1E轉肽酶正確答案:AHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.161.合成DNA的底物是()。HTMLCONTROLForms.HTML:Option.1AdAMP、dCMP、dTMP、dGMPHTMLCONTROLForms.HTML:Option.1BdADP、dCDP、dTDP、dGDPHTMLCONTROLForms.HTML:Option.1CdATP、dCTP、dTTP、dGTPHTMLCONTROLForms.HTML:Option.1DdATP、dCTP、dUTP、dGTPHTMLCONTROLForms.HTML:Option.1EATP、CTP、TTP、GTP正確答案:CHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.162.真核生物mRNA轉錄后加工有()。HTMLCONTROLForms.HTML:Option.1A磷酸化HTMLCONTROLForms.HTML:Option.1B焦磷酸化HTMLCONTROLForms.HTML:Option.1C去除外顯子HTMLCONTROLForms.HTML:Option.1D首尾修飾和剪接HTMLCONTROLForms.HTML:Option.1E把內含子連接起來正確答案:DHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.163.氨基酸是通過下列哪種化學鍵與tRNA結合的?()HTMLCONTROLForms.HTML:Option.1A糖苷鍵HTMLCONTROLForms.HTML:Option.1B磷酸酯鍵HTMLCONTROLForms.HTML:Option.1C酯鍵HTMLCONTROLForms.HTML:Option.1D氫鍵HTMLCONTROLForms.HTML:Option.1E酰胺鍵正確答案:CHTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.164.屬于嘧啶分解代謝的終產物正確的是()。HTMLCONTROLForms.HTML:Option.1A尿酸HTMLCONTROLForms.HTML:Option.1B尿苷HTMLCONTROLForms.HTML:Option.1C尿素HTMLCONTROLForms.HTML:Option.1Dα-丙氨酸HTMLCONTROLForms.HTML:Option.1E氨和二氧化碳正確答案:EHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.165.關于氨中毒描述不正確的是()。HTMLCONTROLForms.HTML:Option.1A肝功能嚴重損害時可引起HTMLCONTROLForms.HTML:Option.1B口服抗生素藥物用于治療氨中毒HTMLCONTROLForms.HTML:Option.1C大量攝入蛋白質可以減緩氨中毒HTMLCONTROLForms.HTML:Option.1D尿素合成途徑的酶缺陷會導致高血氨HTMLCONTROLForms.HTML:Option.1E給予谷氨酸可以減緩氨中毒正確答案:CHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.166.DNA連接酶的作用是()。HTMLCONTROLForms.HTML:Option.1A使DNA雙鏈缺口的兩個末端相連接HTMLCONTROLForms.HTML:Option.1B使DNA形成負超螺旋HTMLCONTROLForms.HTML:Option.1C合成RNA引物HTMLCONTROLForms.HTML:Option.1D將DNA雙鏈解開HTMLCONTROLForms.HTML:Option.1E填補岡崎片段去除引物后的空缺正確答案:AHTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.167.乳糖操縱子的調節(jié)水平在()。HTMLCONTROLForms.HTML:Option.1A復制HTMLCONTROLForms.HTML:Option.1B轉錄HTMLCONTROLForms.HTML:Option.1C轉錄后HTMLCONTROLForms.HTML:Option.1D翻譯HTMLCONTROLForms.HTML:Option.1E翻譯后正確答案:BHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.168.原核生物轉錄起始前-10區(qū)的核苷酸序列稱為()。HTMLCONTROLForms.HTML:Option.1ATATA盒HTMLCONTROLForms.HTML:Option.1BCAAT盒HTMLCONTROLForms.HTML:Option.1C增強子HTMLCONTROLForms.HTML:Option.1D起始位點HTMLCONTROLForms.HTML:Option.1ETTGACA序列正確答案:AHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.169.在離體肝線粒體中加入異戊巴比妥,則1分子琥珀酸氧化的P/O比值為()。HTMLCONTROLForms.HTML:Option.1A0HTMLCONTROLForms.HTML:Option.1B1HTMLCONTROLForms.HTML:Option.1C2HTMLCONTROLForms.HTML:Option.1D3HTMLCONTROLForms.HTML:Option.1E4正確答案:CHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.170.體內轉運一碳單位的載體是()。HTMLCONTROLForms.HTML:Option.1A生物素HTMLCONTROLForms.HTML:Option.1B磷酸吡哆醛HTMLCONTROLForms.HTML:Option.1C四氫葉酸HTMLCONTROLForms.HTML:Option.1D二氫葉酸HTMLCONTROLForms.HTML:Option.1ECoA正確答案:CHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.171.蛋白質分子氨基酸的排列順序決定因素是()。HTMLCONTROLForms.HTML:Option.1A轉肽酶HTMLCONTROLForms.HTML:Option.1BtRNA上核苷酸的排列順序HTMLCONTROLForms.HTML:Option.1CmRNA分子中單核苷酸的排列順序HTMLCONTROLForms.HTML:Option.1D核糖體HTMLCONTROLForms.HTML:Option.1E氨基酸的種類正確答案:CHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.172.鳥氨酸循環(huán)的作用是()。HTMLCONTROLForms.HTML:Option.1A合成尿素HTMLCONTROLForms.HTML:Option.1B合成非必需氨基酸HTMLCONTROLForms.HTML:Option.1C合成AMPHTMLCONTROLForms.HTML:Option.1D協(xié)助氨基酸的吸收HTMLCONTROLForms.HTML:Option.1E脫去氨基正確答案:AHTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.173.DNA復制時,序列5'—TAGA—3'將合成下列何種互補結構?()HTMLCONTROLForms.HTML:Option.1A5'—TCTA—3'HTMLCONTROLForms.HTML:Option.1B5'—ATCT—3'HTMLCONTROLForms.HTML:Option.1C5'—AUCU—3'HTMLCONTROLForms.HTML:Option.1D5'—UCUA—3'HTMLCONTROLForms.HTML:Option.1E5'—TCTA—3'正確答案:AHTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.174.DNA分子中能獨立進行復制的單位稱為()。HTMLCONTROLForms.HTML:Option.1A復制子HTMLCONTROLForms.HTML:Option.1B轉座子HTMLCONTROLForms.HTML:Option.1C操縱子HTMLCONTROLForms.HTML:Option.1D內含子HTMLCONTROLForms.HTML:Option.1E外顯子正確答案:AHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.175.真核生物RNA聚合酶II轉錄產物是()。HTMLCONTROLForms.HTML:Option.1AtRNAHTMLCONTROLForms.HTML:Option.1BhnRNAHTMLCONTROLForms.HTML:Option.1C5SrRNAHTMLCONTROLForms.HTML:Option.1D5.8sRNAHTMLCONTROLForms.HTML:Option.1E45是RNA正確答案:BHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.176.蛋白質生物合成中()。HTMLCONTROLForms.HTML:Option.1A一條mRNA可翻譯出多條多肽鏈HTMLCONTROLForms.HTML:Option.1B一種密碼子只對應一種氨基酸HTMLCONTROLForms.HTML:Option.1C一種氨基酸只對應一種密碼子HTMLCONTROLForms.HTML:Option.1D一種氨基酸只能由一種tRNA攜載HTMLCONTROLForms.HTML:Option.1E一個核糖體中只含有一種rRNA正確答案:BHTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.177.下列參與原核生物肽鏈延伸的因子是()。HTMLCONTROLForms.HTML:Option.1AIF-1HTMLCONTROLForms.HTML:Option.1BRF-1HTMLCONTROLForms.HTML:Option.1CIF-3HTMLCONTROLForms.HTML:Option.1DEF-TuHTMLCONTROLForms.HTML:Option.1EIF-2正確答案:DHTMLCONTROLForms.HTML:Hidden.1HTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.178.下列何種酶不參與DNA損傷的切除修復?()HTMLCONTROLForms.HTML:Option.1ADNA特異性內切酶HTMLCONTROLForms.HTML:Option.1B引物酶HTMLCONTROLForms.HTML:Option.1C5'→3'核酸外切酶HTMLCONTROLForms.HTML:Option.1DDNApolⅠHTMLCONTROLForms.HTML:Option.1EDNA連接酶正確答案:BHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.179.大腸桿菌RNA聚合酶由數個亞單位組成,其核心酶的組成是()。HTMLCONTROLForms.HTML:Option.1Aα2ββ′HTMLCONTROLForms.HTML:Option.1Bα2ββ′σHTMLCONTROLForms.HTML:Option.1Cααβ′HTMLCONTROLForms.HTML:Option.1DααβHTMLCONTROLForms.HTML:Option.1Eαββ′正確答案:AHTMLCONTROLForms.HTML:Hidden.1單選題HTMLCONTROLForms.HTML:Hidden.180.符合對轉錄的描述的是()。HTMLCONTROLForms.HTML:Option.1A大多數生物體轉錄以RNA為模版HTMLCONTROLForms.HTML:Option.1B原核生物轉錄與翻譯相偶聯(lián)HTMLCONTROLForms.HTML:Option.1C真核生物轉錄酶只有一種HTMLCONTROLForms.HTML:Option.1D原核生物轉錄的mRNA需切除內含子的編碼序列才能作為翻譯的模版HTMLCONTROLForms.HTML:Option.1E真核生物的轉錄是在細胞質中完成正
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