电大医学类考试模拟题及答案（Simulation questions and answers of medical examination in RTVU）.docVIP

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电大医学类考试模拟题及答案（Simulation questions and answers of medical examination in RTVU）.doc

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电大医学类考试模拟题及答案（Simulation questions and answers of medical examination in RTVU）

电大医学类考试模拟题及答案（Simulation questions and answers of medical examination in RTVU） 06 spring review questions (multiple-choice questions) 1, the nitrogen content of various proteins is similar, and the average content is A.18% B.16% C.20% D.15% E. 22% 2 the major chemical bonds that maintain the primary structure of proteins are A. B. C. salt bond hydrophobic bond D. two disulfide bond E. peptide 3, the major difference between denatured proteins and natural proteins is that A. is easily hydrolyzed by protease, B. solubility decreases, C. viscosity increases, D. color reaction increases, and E. loses biological activity What are the main structural abnormalities in the 4 molecular disorder? A. primary structure, B. two stage structure, C. three stage structure, D. four level structure, E. space structure 5 the maximum wavelength of ultraviolet absorption of proteins is A.320nm, B.260nm, C.280nm, D.190nm, E.220nm 6. the primary structure and spatial structure of proteins are determined by (?) Hydrogen bonds in A. molecules; secondary bonds in B. molecules; C. amino acids; composition and order Two the number of disulfide bonds in D. molecule internal hydrophobic bond in the molecule of E. 7. protein denaturation is due to Alteration of the primary structure of A. proteins; depolymerization of B. protein subunits; destruction of the spatial conformation of C. proteins; alteration of the three class structure of D. proteins; loss of biological activity on E. proteins The products of 8.RNA and DNA are thoroughly hydrolyzed A. ribose is different and part of base is different B. bases are identical, ribose is different C. bases differ, ribose is different D. bases are different and ribose is the same E. or more is wrong 9. which of the following bases exist only in mRNA but not in DNA? A.T, B.U, C.C, D.G, E., A 10. the connection between units in a nucleic acid is A.2 , 3 two phosphoric acid ester B.3 , 5 two phosphoric acid ester C.2 , 5 two phosphate ester; D. peptide; E.