首都医科大学 o|w
w>m
h-\Ov{~
生物化学 +v/-qyA
zm3$)*p1
2015首都医科大学博士入学考试-生物化学回忆版 GK[Hs1/
BS%pS(
一、名词解释(应该是5个,但是记不清是哪5个了) HX ,\a`
;]k\F
1.chaperon 2.motif 3.allosteric enzyme 4.ribozyme 5.gluconeogenesis 6.sernicon servativereplication GI>(S
@"H7Q1Hg!*
二、选择题(很多题记不太清楚了,细节问题请包容) pG22Nx
/qFY$vj
1.Which of the followingstatements concerning protein domains is true? ">MsV/
J:OP*/@='
A.they are examples ofstructural motifs MI-
S}Qoe
N`4XlD
B.large polypeptide may beorganized into struoturally close but functionally independent units nm_4E8&X
14A(ZWwq9
C.the consist of separatepoly peptide chains(subunits) Nw(hN+_u
JJ'f\f9
D.they have been found onlyin prokaryotic proteins Z!*6;[]SfG
KK{_s=t
%<
2.Prion disease aregenerally believed to a associated with )&Z`SaoP|J
PHJHW#sv
A.infection by a RNA vins B.infection by DNA C.infection by protein D.infection by mRNA Xk1uCVUe5
YV} "#
3.The secondary structureof transfer RNA is [Jj@A(Cz
4S4g
K
A.described as double helix B.described as reversed “L” C.described as cloverleaf D.present only ineukaryotic cells qz2`%8}F)
PKC0Dt;F.
4.In competitive inhibiyion n-{ d7haOa
mSvSdKKKlI
A.Km not change,Vmax not change B.Km rise, Vmaxnot change C.Km not change,Vmax rise D.Km rise, Vmaxrise wLb:FB2
+@yU `
5.The part og the RNApolymerase noloenzyme that initiates binding to DNA is called the ^2{ 6W6=
2`j{n\/
A.sigma factor B.intron C.ribosomal RNA D.core enzyme gs=ok8w
ofw&?Sk0
6.Sunlight can damage DNAby Qe-Pg^PS]
4_sJ0 =z-
A.making apyrimidinic sites B.causing spontaneousdeamination of bases /GM!3%'=
~WORC\kCW
C.forming pyrimidinedimmers D.alkylating DNA
t&
F:C
4;3Vc%
7.Which is therate-limiting enzyme, inregulation of the pentose phosphate pathway? S'W,AkT
N)Q.P'`N
A.hexokinase B.6-phosphofructokinace-1 C.Clucose-6-phosphatedehydrogenase D.pyrurate dehydrogenase VzIZT{
J\w4N",
8.Transcription is theprocess in which Yw]$/oP`
>~]|o
A.protein is synthesized from DNA B.DNA is replicated H&%oHyK
5uahfJk
C.RNA is synthesized from protein D.ENA is synthesized fromDNA &0\:MJc
,
V,Q(!$F
9.Which of the following isa sis-acting element? *?~"Jw
qyFeq])
A.RNA polymerase B.Enhancer C.transcriptionfactor I D.structural gene GnUD<P=I
@1&"S7@}u
10.The protein that canbind to RNA and prevent the trascription is called #NGtba
)8rF'pxI
A.inducer B.repressor protein C.cis-acting element D.positive regulatoryproteins M%Rr=
4e .19H9
11.蛋白质吸收紫外光的大小取决于 _yR_u+5
"*j8G8
A.脂肪族氨基酸含量 B.酸性氨基酸含量 C.芳香族氨基酸含量 D. 蛋氨酸含量 (!N2,1|
fe`_0lxj
12.DNA变性是指 j$XaO%y)
_h \L6.
A.分子中磷酸二酯键断裂 B.多核苷酸链解裂 C.DNA分子由超螺旋变为双键双螺旋 D.互补碱基之间氢键断裂 .U@u |
trrK6(p
13.关于关键酶的叙述哪项错误? na8`V
`77
7)[Ve1;/N
A.关键酶常是变构酶 B.关键酶常位于代谢途径的起始或分叉部位 DUl+Jqn4B
NziCN*6
C.关键酶是共价修饰酶 D.关键酶活性最高 s !2Iui
@
hLuv
14.下列哪个反应是三羧酸循环中的底物水平磷酸化反应: w:deQ:k
Q4LPi;{\
A.异柠檬酸—α-酮戊二酸 B.琥珀酰COA—琥珀酸 C.琥珀酸—延胡索酸 D.延胡索酸—苹果酸
MI(#~\Y~P
$H)!h^7^9
15.体内贮存脂肪主要代谢来自 N *$GP3]
uo2k
A.酮体 B.葡萄糖 C.脂肪酸 D.生糖氨基酸 Op]*wwI*h
RC1bTM
16.人体内CO2生成方式是: Jh&DL8`
e/:? 9
A.O2与C直接合成 B.O2与CO结合 C.有机酸的脱羧 D.一碳单位与O2结合 ;Bz|hB{
H,GjPIG
17.飘零核苷酸从头合成时生成的重要代谢中间物是: x=7:D
B&rN