Why does the anhydride react with the OH on the benzene rather than the OH on the carboxy group?

Answer the followings: 1- What is the IP for a amino acid? Give example. 2- What are the types of amino acids? 3- What are the structures of protein? 4- The N-Terminal analysis by the Edman method shows saralasin contains sarcosine at the N- terminus. Partial hydrolysis of saralasin with dilute hydrochloric acid yields the following fragments: Tyr-Val-His Sar-Arg-Val His-Pro-Ala Val-Tyr-Val Arg-Val-Tyr What is the structure of saralasin? 5. MATCH a term from the list below to each definition. Place the letter of the term in the blank to the left of the definition. a. Ligases b. Fibrous proteins c. Conjugated protein d. Hydrolases a. b. C. e. Simple protein f. Globular proteins g. Lyases h. Transferases Proteins that are tough and insoluble in water. Enzymes that catalyze the breaking away of a small molecule such as from a substrate. Enzymes that catalyze the bonding together of two substrates.

Answer the followings (Four): 1-What is the difference(s) between FOUR: a. Glyceride and phosphoglyceride. b. Wax and fat. c. Soap and fatty acid. d. HDL and LDL cholesterol e. Phospho lipids and sphingosine. 2-What are the types of lipids? 3-What are the main lipid components of membrane structures? 4-How could lipids play important rules as signaling molecules and building units? 5. The Structure variety of Lipids makes them to play significant rules in our body. Conclude briefly on this statement.