Which of the following statements correctly describe the peptide bond hydrolysis reaction? [Select all that apply.] At high pH the effectiveness of the nucleophile improves. The reaction is faster at pH 14.0 than at pH 7.0. The reaction is fastest at pH 7.0. At high pH the effectiveness of the electrophile improves. The reaction is faster at pH 0.0 than at pH 7.0.
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- When aspirin is made from acetic acid, the by product is H2O; when acetic anhydride 1Sused, the by-product is acetic acid. When acetyl chloride is used (see above), the by product is HC1. Which route should you use if you were working for Leica, a company that mass produces aspirin on a daily basis? Why?Define Nucleophilicity Versus Basicity ?Covalent enzyme catalysis involves the formation of a transient covalent bond between an enzyme and its substrate Below is the general structure of a commonly encountered so-called acyl-enzyme intermediate Ent- NH OH+Ent Select amino acid residues from the table beliow that have side chains with the enzyme reactive groups indicated in the above reaction (if more than one, start with lowest numbered first. Amino acid No 3-detter code What is the chemical name of the acyl-enzyme intermediate compound (acylimidazole, anhydride, ester, Schif base, thioester? 2) 3 HN HO HO HO HO (5) 6 HN HD HO HN HO HO 03 15 HN HN HO HO HO HO 08 09 20 HO
- The aminolysis of acetic anhydride will produce aniline and ammonia as major products. True or FalseDraw structure of gylciline value at 5.97 pH, 13.0 pH, 2.0 pH and 11.0 pHThe conjugate base of diethyl malonate can serve as a nucleophile to attack a wide range of electrophiles. Identify the product that is formed when the conjugate base of diethyl malonate reacts with the following electrophile followed by acid workup when relevant: Modify the provided structures of diethyl malonate and the given electrophile to draw the product formed. Note: the eraser tool can be used to erase bonds, and atoms can be moved by selecting them with the selector tool and then dragging the selected atom(s) to a new position. If you make a mistake, you can use Ctrl-Z or the Undo tool. бль EtO OEt Edit Drawing
- Given the information pictured, The final step of the reaction sequence uses PhLi. Provide a reason and possible mechanism by which this final elimination and hydrolysis reaction would occur.The conjugate base of diethyl malonate can serve as a nucleophile to attack a wide range of electrophiles. Identify the product that is formed when the conjugate base of diethyl malonate reacts with the following electrophile followed by acid workup when relevant: Modify the provided structures of diethyl malonate and the given electrophile to draw the product formed. Note: the eraser tool can be used to erase bonds, and atoms can be moved by selecting them with the selector tool and then dragging the selected atom(s) to a new position. If you make a mistake, you can use Ctrl-Z or the Undo tool. OH -CH₂ CH₂ Edit DrawingThe conjugate base of diethyl malonate can serve as a nucleophile to attack a wide range of electrophiles. Identify the product that is formed when the conjugate base of diethyl malonate reacts with the following electrophile followed by acid workup when relevant: CN Modify the provided structures of diethyl malonate and the given electrophile to draw the product formed. Note: the eraser tool can be used to erase bonds, and atoms can be moved by selecting them with the selector tool and then dragging the selected atom(s) to a new position. If you make a mistake, you can use Ctrl-Z or the Undo tool. EtO H3C CN Edit Drawing OEt
- Complete the structures of these two am ino acids at the pH values given. Explain why the structures change at different pH values. ÇH3 H2N- -COOH H2N-C СООН H H alanine glycine at pH 1 at pH 7 at pH 14ANSWER ALL QUESTIONS 4(a) Suggest a test you will use to show that a given food substance contains protein. Show how you will use Modified Gabriel’s Synthsis Streckers’s Synthesis to prepare phenylalanine in the laboratory. 5 (a) Describe in detail how you will determine the primary structure of protein. You have been given a mixture of lysine, histidine and cysteine. The isoelectric point of the amino acids are as follows: Histidine 7.64 Lysine 9.74 Cystenie 5.02 Show how you will separate the mixture into the pure forms. State and describe any instrument that you will use to separate the components in the mixture.Phenylalanine as N-termminus is incorrect. Please provide the correct solution.