考研生化要点（Biochemical points）.docVIP

考研生化要点（Biochemical points） Biochemical points 2009-11-08 13:06 (category: default category) Biochemistry 1 amino acids without genetic code 2, sulfur-containing amino acids 3 amino acids containing two hydroxyl groups 4 amino acids containing two amino groups Amino guanidine containing 5. 6, amino group containing imidazole 7, glucogenic and ketogenic amino acid 8 essential amino acids 9, positively charged amino acids 10, when PH and PI are consistent, facultative ion 11. The chemical bond that holds the a helix is 12 leucine zipper belongs to the protein [motif structure] 13, the protein is * * structure 14 protein denaturation is due to 15, for a white barrier containing His residues, the use of ion exchange chromatography should be given priority to strictly control what [eluent PH]] 16. Which of the following methods can be used to determine the molecular weight of proteins [density gradient centrifugation]? 17, mRNAs narrative, wrong 18, ribozymes narrative, the correct thing is 19. The greatest absorption of nucleic acid at 260nm is because the purine ring has conjugated double bonds 20, DNA degeneration occurs when the phenomenon is 21. What are the maximum UV absorbance values of nucleic acids near that wavelength? 22, after the denaturation of nucleic acids, the effect is 23, compared with the general catalyst, there are different points 24, a simple enzymatic reaction, when [S]Km occurs, is the phenomenon 25, when the blood sugar concentration drops, the brain still can absorb the glucose, but the liver can not, because 26, its Vmax decreased compared with no inhibitor 27, its Km decreased compared with no inhibitor 28. Which of the following is the competitive inhibitory effect of sulfanilamide? 29. Description of zymogen activation 30. The abundant LDH isozymes in liver are 31. The isoenzymes rich in myocardium are 32. Digestive enzymes contained in saliva 33, the lack of oxygen, the main way of glycerol phosphate aldehyde produced is NADH+H+ 34. Enzyme