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【简答题】
(Li Mei)、(Wang Shuang)、(Zhang Chen)三位刚上大学的新生在宿舍谈论家乡冬天的天气。请根据她们的对话内容,在表格中填写她们的家乡名称以及她们家乡相对应的天气情况。 Li Mei: My hometown is Changchun. It is cold, sunny and snowy in winter. How about your hometown, Wang Shuang? Wang Shuang: I come from Sanya. It’s warm and pleasant even in winter. Zhang Chen: It is a good thing to stay in Sanya at that time. My hometown is Xi’an. It is cold and windy in winter. Name Hometown Weather in winter Li Mei 1 ________ cold, 2 ________and snowy Wang Shuang Sanya 3 ______________and pleasant Zhang Chen 4 Cold and 5
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【单选题】工化 2.4.6 同温同体积下,在 A 和 B 混合气体中,若混合气体总压力为 101.3 kPa , B 的摩尔分数为 0.200 ,则 A 的分压为 ( )
A.
20.2 kPa
B.
81.0 kPa
C.
85.1 kPa
D.
101.3 kPa
【单选题】What will happen if the amino acid sequence is used directly for primer designing?
A.
There would be certainty because the genetic code is unique for each amino acid
B.
There would be uncertainty as the genetic code is degenerate and none of the amino acid is having a unique code
C.
There would be uncertainty as the genetic code is degenerate but some of the amino acids such as methionine are having a unique codon
D.
The amount of uncertainty or certainty is a matter of chance
【多选题】What is the biological and pharmaceutical role of D-amino acids?
A.
Although D-amino acids do not generally occur in proteins, they do serve some special functions in the structure of bacterial cell walls and peptide antibiotics.
B.
Bacterial peptidoglycans contain both D-alanine and D-glutamate. D-Amino acids arise directly from the L isomers by the action of amino acid racemases, which have pyridoxal phosphate as cofactor. Amino acid racemization is uniquely important to bacterial metabolism, and enzymes such as alanine racemase are prime targets for pharmaceutical agents.
C.
One such agent, L-fluoroalanine, is being tested as an antibacterial drug. Another, cycloserine, is used to treat tuberculosis.
D.
Because these inhibitors also affect some PLP-requiring human enzymes, however, they have potentially undesirable side effects.
【简答题】What are amino acids?
【单选题】What has a significant position in the growth of human body tissues?
A.
Essential amino acids.
B.
Non-essential amino acids.
C.
Fat.
D.
Proteins.
【单选题】下列程序段的输出结果是()。 int aa[4][4]={{1,2,3,4},{5,6,7,8},{3,9,10,2},{4,2,9,6}}; inti,s=0; for(i=0;i<4;i++) s+=aa[i][1]; printf("%d\n",s);
A.
11
B.
19
C.
13
D.
20
【简答题】下列程序段的输出结果是()。int aa[4][4]={{1,2,3,4},{5,6,7,8},{3,9,10,2},{4,2,9,6}};int i,s=0;for(i=0;i<4;i++)s+=aa[i][1];printf("%d\n",s);A. 11 B. 19 C. 13 D. 20
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