首都医科大学
+c206.
Jx-wO/
生物化学 K&A;Z>l,v5
TUp%FJXA|
2015首都医科大学博士入学考试-生物化学回忆版 =Pe><k
Jd
3@cLCe-
一、名词解释(应该是5个,但是记不清是哪5个了) 9x~-*8aw
,<ya@Fi{
1.chaperon 2.motif 3.allosteric enzyme 4.ribozyme 5.gluconeogenesis 6.sernicon servativereplication Zu<]bv
H5wb_yBQ+
二、选择题(很多题记不太清楚了,细节问题请包容) fW0$s`
Sm3u /w!
1.Which of the followingstatements concerning protein domains is true? j kn^Z":
(!K+P[g
A.they are examples ofstructural motifs e`U
Qz$4!
yOHXY&
B.large polypeptide may beorganized into struoturally close but functionally independent units S0@T0y#
x%BF{Sw
C.the consist of separatepoly peptide chains(subunits) "HQF.#\#
@Gjny BJ
D.they have been found onlyin prokaryotic proteins :.IN?X
?F$6;N6x
2.Prion disease aregenerally believed to a associated with J=WB6zi
o<VP'F{p
A.infection by a RNA vins B.infection by DNA C.infection by protein D.infection by mRNA `6w#8}
Px4/O~bLk
3.The secondary structureof transfer RNA is ,-#GX{!
ZCiY,;c
A.described as double helix B.described as reversed “L” C.described as cloverleaf D.present only ineukaryotic cells +g\;bLT
.gD km^
4.In competitive inhibiyion 2cnj@E:5l
Lx+`<<_dJ
A.Km not change,Vmax not change B.Km rise, Vmaxnot change C.Km not change,Vmax rise D.Km rise, Vmaxrise IcoowZZ
!EFBI+?&
5.The part og the RNApolymerase noloenzyme that initiates binding to DNA is called the YF[$Q=7.
?JqjYI{$
A.sigma factor B.intron C.ribosomal RNA D.core enzyme ,{<Fz%
%Y',|+Arx
6.Sunlight can damage DNAby 5H.Db
84`rbL
!M
A.making apyrimidinic sites B.causing spontaneousdeamination of bases vfbe$4mH
f-+.;`H)T
C.forming pyrimidinedimmers D.alkylating DNA &va*IR
v ($L
7.Which is therate-limiting enzyme, inregulation of the pentose phosphate pathway?
T&/_e
TG]}X\c+V|
A.hexokinase B.6-phosphofructokinace-1 C.Clucose-6-phosphatedehydrogenase D.pyrurate dehydrogenase Mo|yv[(K,
)F
E8D
8.Transcription is theprocess in which BTs0o&}e
tR O IBq|
A.protein is synthesized from DNA B.DNA is replicated uGCtLA+sL
>Z"9rF2SW
C.RNA is synthesized from protein D.ENA is synthesized fromDNA k`@w(HhS
)Pa*+ew7
9.Which of the following isa sis-acting element? H5p5S\g-)
Bm<^rhJ9
A.RNA polymerase B.Enhancer C.transcriptionfactor I D.structural gene `,m7xJZ?y
r#I>_Utsy
10.The protein that canbind to RNA and prevent the trascription is called "aA_(Ydzj
`vX4!@Tw
A.inducer B.repressor protein C.cis-acting element D.positive regulatoryproteins SJ[AiHR
` U#Po_hq
11.蛋白质吸收紫外光的大小取决于 qOgtGN}k
5%'S
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 fO+UHSC
u#!GMZJN
12.DNA变性是指 PC0HH
iP,v=pS6
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 xfes_v""
6d};|#}
13.关于关键酶的叙述哪项错误?
:@;
6
7y>(H<^>
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 mCK],TOA:
9PCa*,
C.关键酶是共价修饰酶 D.关键酶活性最高 ]p\u$VY9
Vp\80D&
14.下列哪个反应是三羧酸循环中的底物水平磷酸化反应: g@}6N.]#
IY03"
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 KZZ
Oi:
{9 Db9K^
15.体内贮存脂肪主要代谢来自 _~:j3=1&