MCB 3020C Lecture Notes - Lecture 1: Microbiology, Ribitol, Pyruvate Decarboxylase
Document Summary
Growth problems (2 questions: know how to do the standard 5 problems. Abc transport, group transport, facilitated vs simple diffusion. Types of transport: passive, simple diffusion: non-saturable, facilitated diffusion: saturated at high concentrations of solute. Cell walls protect cell from osmotic pressure and prevents cell lysis. Also, gives the ability to the cell to hold its shape and rigidity: gram + have a thick layer of peptidoglycan, gram - have a thin layer of peptidoglycan and lps. Peptidoglycan: a rigid layer or sheet composed of two sugar derivatives, n-acetylglucosamine (g) and n-acetylmuramic acid (m). Also, amino acids such as l-alanine, d-alanine, d- glutamic acid and either lysine or diaminopimelic acid (dap). The amino acids form peptide bonds in the y direction while the sugars form beta 1,4-glycosidic bonds in the x direction. *the picture on the right has structure of dap (gm -) and. The bacteria cell wall will either have dap or lysine.
