大連醫(yī)科大學生物化學試題(英文卷)

1、歡迎光臨大連醫(yī)科大學百度貼吧 歡迎光臨大連醫(yī)科大學百度貼吧百度貼吧 百度貼吧_大醫(yī)吧 大醫(yī)吧 http://tieba.baidu.com/f?kw=%B4%F3%D2%BDChapter1 Nucleic AcidsI、Choose one correct answer. Mark your answer by circling the capital letter you choose. 1. The direction of n

2、ucleic acid isA. From N to C B. From 5’ to 3’C. From C to N D. From 3’ to 5’E. None of above2. The description of the secondary structure of DNA double helix are correct, EXCEPTA.

3、Two antiparallel strandsB. Deoxyribose-phosphate frame located outside the strandsC. Two strands are joined by hydrogen bond formed between A-T and G-CD. Diameter of helix is 2 nm, and 10 bases in each turnE. Nucleosome

4、is the structure unit of DNA double helix3. The correct description about Tm is A. The temperature at which half of the maximum absorbance value of DNA at 260nm during heat denaturation B. The temperature at which maximu

5、m absorbance value of DNA at 260nm during heat denaturationC. The optimum temperature for DNA synthesis D. High Tm value is related to low G-C content E. The temperature to form DNA and RNA hybrid molecule4. If the code

6、n of mRNA is ACG, then the anticoden of tRNA isA. UGC B. TGC C. GCA D. CGU E. TGC5. The linkage between nucleotides is A. 2’,-3’ phosphodiester bond; B. 3’,-5’ phosphodiester bondC. 2’,-5’ phosph

7、odiester bond; D. Hydrogen bondE. Peptide bond6. The template strand of DNA is 5’-ATTCAG-3 ’ , its transcript isA. 5’ -GACTTA-3’ C. LysD. ArgE. Ser2. Which is the linkage bond for the peptide?A. Hydrogen bo

8、ndB. Peptide bondC. Hydrophobic interactionsD. Electrostatic interactionE. 3’, 5’ –phosphodiester bond3. The protein molecule (pI=6.5) will mobile the to positive electrode when the pH of electrophoresis buffer isA. pH=3

9、.0B. pH=4.0C. pH=5.0D. pH=6.5E. pH=8.04. The amino acid in proteins isA. L-β-aimno acids; B. D-β-aimno acids;C. L-α-aimno acids; D. D-α-aimno acids;E. All of above5. The chemical bond in c

10、harge of maintaining secondary structure of proteins isA. Salt bridge; B. Disulfide bondC. Hydrogen bond; D. Peptide bond;E. Hydrophobic interaction6. The chemical bond in charge of

11、the primary structure of proteins isA. Salt bridge; B. Disulfide bondC. Hydrogen bond; D. Peptide bond;E. Phosphodiester bondII II、Fill in the blanks：1. The secondary structures of