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浙江省2007年4月高等教育自学考试生物化学(三)试题_第2页

来源:考试网 [ 2012年3月3日 ] 【大 中 小】

21.蛋白质分子中的平均含氮量为(  )
A.6.25%                                                              B.16%
C.18%                                                                  D.19%
22.在三羧酸循环中,催化底物水平磷酸化的反应是(     )
A.琥珀酰辅酶 A→琥珀酸                                 B.柠檬酸→异柠檬酸
C.α-酮戊二酸→琥珀酰辅酶 A                         D.苹果酸→草酰乙酸
23.糖原合成中,葡萄糖的活化需要(     )
A.ATP                                                                 B.CTP
C.GTP                                                                  D.UTP
24.酮体生成的原料是(   )
A.乙酰乙酸                                                          B.乙酰辅酶 A
C.乙酰乙酰辅酶 A                                             D.β-羟基β-甲基戊二酸单酰辅酶 A
25.下述氨基酸中属于必需氨基酸的是( )
A.丙氨酸                                                              B.谷氨酸
C.丝氨酸                                                              D.苯丙氨酸
26.在蛋白质生物合成中具有转运氨基酸作用的 RNA 是(  )
A.mRNA                                                             B.rRNA
C.HnRNA                                                           D.tRNA
27.调节体内无机盐代谢的激素是( )
A.抗利尿激素                                                      B.醛固酮
C.皮质醇                                                              D.血管紧张素
28.人体血浆中缓冲容量最大的缓冲对是(       )
A.NaHCO3/H2CO3                                                                                         B.KHCO3/H2CO3
C.Na2HPO4/NaH2PO4                                                                               D.K2HPO4/KH2PO4
29.若 Km=1 mmol/L,当 V=98%Vmax 时,[S]等于(     )
A.33 mmol/L                                                      B.49 mmol/L
C.53 mmol/L                                                      D.69 mmol/L
30.下列既可以生糖又可以生酮的氨基酸是(       )
A.亮氨酸                                                              B.赖氨酸
C.苯丙氨酸                                                          D.丝氨酸
二、多项选择题(本大题共 5 小题,每小题 2 分,共 10 分)
在每小题列出的五个备选项中至少有两个是符合题目要求的,请将其代码填写在题后的括号内。错选、
多选、少选或未选均无分。
31.肝脏在糖代谢中的重要作用有(     )
A.糖原合成                                                         B.糖异生
C.调节血糖                                                         D.磷酸戊糖途径
E.合成脂肪 
32.影响血红蛋白与氧结合的因素有(     )
A.呼吸频率                                                          B.呼吸深浅
C.氧分压                                                              D.2,3-DPG
E.Bohr 效应
33.血浆中的缓冲对有(        )
A.碳酸氢盐缓冲对                                              B.磷酸盐缓冲对
C.血浆蛋白缓冲对                                              D.硫酸盐缓冲对
E.血红蛋白缓冲对
34.人体内常量元素有(        )
A.铜                                                                      B.镁
C.氟                                                                      D.磷
E.锰
35.现知人体第二信使有(        )
A.cAMP                                                              B.cGMP
C.钙离子                                                              D.cTMP
E.cUMP 
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