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186901
米氏常数是一个用来衡量()。
186902
辅酶NADP+分子中含有的B族维生素是()。
186903
目前公认的酶与底物结合的学说是()。
186904
丙二酸对于琥珀酸脱氢酶的影响属于()。
186905
磺胺类药物的类似物是()。
186906
酶原之所以没有活性是因为()。
186907
在同一多核甘酸链内的相反方向上存在的重复核甘酸序列称。
186908
Ⅰ型既能催化宿主DNA的甲基化,又催化非甲基化的DNA的水解。
186909
指当双螺旋DNA熔解(解链)时,260nm处紫外吸收值增加的现象。
186910
是染色质的基本组成单位,由DNA链缠绕一个组蛋白核构成。
186911
核苷是嘌呤或嘧啶碱通过与戊糖连接组成的化合物。
186912
蛋白质变性是指生物大分子的天然构象遭到破坏导致其丧失的现象。
186913
是由一条肽链和一个血红素辅基组成的结合蛋白,是肌肉内储存氧的蛋白质,它的氧饱和曲线为双曲线型。
186914
结构域通常都是几个单元的组合。
186915
蛋白质二级结构是指蛋白质多肽链的主链通过折叠形成的高级结构。
186916
构象指一个分子中,不改变共价键结构,仅单键周围的原子放置所产生的。
186917
现代生物化学研究发展的几个重要阶段包括:静态生化、、机能生化和分子生化。
186918
物质代谢与能量代谢相伴随,在此过程中,是能量转换和传递的中间体。
186919
根据研究对象分为:、植物生物化学、微生物生物化学等。
186920
生物体与外界环境进行有规律的物质交换,称为。
186921
生物化学研究内容是关于生命有机体的化学组成、生物分子结构与功能,特别是结构、功能。
186922
核酸的一级结构就是其碱基序列。
186923
核酸具有两性解离的性质。
186924
mRNA是细胞中含量最多的RNA。错
186925
DNA双螺旋具有多样性。
186926
所有生物以DNA作为遗传物质。
186927
通过研究蛋白质功能可以为探究蛋白质的结构提供线索。
186928
构象是蛋白质分子所特有的。
186929
盐析和盐溶与蛋白质分子表面的氨基酸残基分布有关。
186930
蛋白质氨基酸有20种。
186931
蛋白质是生命的物质基础。
186932
Avery等人于1944年完成了肺炎球菌转化试验,证明DNA是遗传物质。
186933
分子生物学是在生物化学基础上发展起来的。
186934
动物生物化学是动物类专业的一门基础学科。
186935
动物生物化学是从细胞水平阐明动物生命现象本质的一门学科。
186936
生物化学是化学的一门分支学科。
186937
染色质是存在于真核生物间期细胞核内,易被碱性染料着色的一种无定形物质。染色质中含有作为骨架的完整的()。
186938
重组DNA技术也称之为基因工程,利用(),按照预先设计的要求,将一种生物的某种目的基因和载体DNA重组后转入另一生物细胞中进行复制`转录和表达的技术。
186939
有关RNA的描写哪项是正确的()。
186940
不可用于测量生物样品中核酸含量的元素是()。
186941
下列哪些碱基是DNA和RNA分子中都存在的()。
186942
蛋白质在受到()等作用时,次级键受到破坏,导致天然构象破坏,使蛋白质生物活性丧失。
186943
以下不是蛋白质变性主要特点的是()。
186944
关于蛋白质结构的叙述,正确的是()。
186945
关于具有四级结构的蛋白质,叙述错误的是()。
186946
关于蛋白质三级结构的叙述,正确的是()。
186947
关于物体内元素的叙述,正确的是()。
186948
下列化学键中,属于次级键的是()。
186949
关于巯基(-SH)的叙述,正确的是()。
186950
关于对碳元素的叙述,正确的是()。
186951
下列属于生物大分子的是()。
186952
大部分真核细胞mRNA的3′-末端都具有()。
186953
核酸对紫外线的最大吸收峰在哪一波长附近()。
186954
DNA的Tm值较高是由于下列哪组核苷酸含量较高所致()。
186955
自然界游离核苷酸中,磷酸最常见是位于()。
186956
蛋白质胶体,在()的条件下不稳定。
186957
维持蛋白质二级结构的主要次级键是()。
186958
血红蛋白是由含有血红素辅基的()个亚基组成的结合蛋白。血红蛋白负责将氧由肺运输到外周组织,它的氧饱和曲线为S型。
186959
测得某一蛋白质样品中蛋白氮含量为0.40g,此样品约含蛋白质()g。
186960
关于氢键的叙述,正确的是()。
186961
关于疏水相互作用的叙述,正确的是()。
186962
不属于生物化学研究内容的是()。
186963
生物化学是从()水平揭示生命本质的一门学科。
186964
One day he'll realize that I was right, as sure as().
186965
Though there were examples showing that several boxers in their 40’s were still winning world championships, he decided to retire from the() at age 34.
186966
In mathematics, a(n) ()angle refers to either of two angles that added together to produce an angle of 90°.
186967
If you think I care what he says, you're wrong—I don't give a () !
186968
A Dear () letter refers to a letter written to a man by his wife or romantic partner to inform him their relationship is over because she has found another lover.
186969
Tom is as good as his ()—if he promised to help you move, then he'll be here.
186970
Let's draw () to decide who will go first—it's the only fair way to do it.
186971
The constant fights that Michael got into at school caused the principal to () him.
186972
They are looking for a happy (): a house that is not too big but has lots of storage space.
186973
Be careful with that knife – it’s ()sharp.
186974
My boss made it () clear that none of us should be late again.
186975
These shoes were () cheap -- I found them on the clearance rack.
186976
He was ()drunk and behaved really badly.
186977
China made a clean () of all nine titles in the event, with three more gold medals today.
186978
They tried to () embarrassing evidence under the carpet.
186979
She needed badly to () herself, but there was no bathroom in sight.
186980
I was caught () at the restaurant, so I had to borrow money from my mom.
186981
We have to catch the () now or we will be left behind in the future.
186982
Right after I got married, I got a big promotion at work, so I was really on the() of a wave at the moment!
186983
The magician made the rabbit disappear with a () of his wand.
186984
We're having Mary over for dinner tomorrow night. I just hope her husband doesn't come along with her because he is sometimes a () in the rear.
186985
Smith finished in 2nd place, Warren in 3rd, with poor Davis bringing up the () in 12th place.
186986
Bill's father is strict with him and he has to () the line.
186987
Don't believe everything you read literally. Learn to read ()the lines.
186988
The old man's face was covered in ()and wrinkles.
186989
He was left with () all over his face when his forecast was proved wrong.
186990
A () egg is a substantial sum of money or other assets that have been saved or invested for a specific purpose.
186991
I’d like the egg cooked () side up, fried on only one side, with the yolks intact, and runny.
186992
She often speaks ill of other people. She really has an evil ().
186993
People voted for him as the () of two evils.
186994
War, famine, and flood are terrible () in the world.
186995
The teacher designs many interesting games in her classroom teaching to draw the pupils’ attention since children are usually easily ().
186996
The volcano () last week and destroyed the whole village.
186997
They killed the man in such a miserable way. People who commit crimes like that aren't ().
186998
We need some male () for a psychological experiment.
186999
It is difficult for old people to () through the winter.
187000
He worked part time to go ()his higher education.
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